When Does a Chronic Cough Need a Pulmonologist? How Lung Disease Evaluation Is Organized

The cough starts to shape a person’s day before they notice it. They choose the aisle seat so they can slip out of a meeting. They keep a water bottle in every room. Friends have stopped asking whether they are coming down with something, because the answer has been the same for three months.

By then the question has usually shifted from “what is this” to “who should I see.” Searching for a pulmonologist for chronic cough feels like the obvious next move; a cough comes from the lungs, so surely a lung doctor is the right expert. The truth is more layered. Chronic cough often begins somewhere other than the lungs, and the way lung disease evaluation is organized reflects that.

This explainer walks through how that pathway works in practice: when primary care handles the first steps, when a referral makes sense, what a pulmonologist actually does during an evaluation, and what the evidence says about causes and treatment. The goal is to help you arrive at the right appointment with the right expectations.

What counts as a chronic cough, and why the eight-week line matters

Clinicians sort coughs by the calendar, not by how miserable they feel. The NHS notes that most coughs linked to a cold or chest infection clear up within three to four weeks without any treatment. Mayo Clinic defines a chronic cough as one lasting eight weeks or longer in adults, or four weeks or longer in children. The stretch in between, roughly three to eight weeks, is often called a subacute cough, and it most often reflects the tail end of an infection that has already run its course.

Why draw the line at eight weeks? Because the list of likely causes changes. In the first three weeks, viral infections dominate. By eight weeks, a lingering infection becomes less plausible and the search turns toward persistent drivers: airway inflammation, postnasal drip, acid reflux, a medicine side effect, or an underlying lung condition.

The eight-week threshold is a guide, not a wall. Someone who coughs up blood or becomes breathless at week two should not wait six more weeks before seeking care. Someone with a mild tickle after a bad cold at week five is usually safe to give it a little more time, as long as nothing else is wrong.

One more distinction matters: whether the cough is dry or produces mucus. A productive cough on most days for at least three months in two consecutive years is the working definition of chronic bronchitis, one of the conditions grouped under chronic obstructive pulmonary disease (COPD), a term for long-term airway narrowing most often linked to smoking. A dry, tickly cough that worsens at night or after talking suggests different mechanisms. Noting which type you have helps whoever evaluates you narrow the field quickly.

Does a pulmonologist treat chronic cough? What the specialty covers

Yes, a pulmonologist treats chronic cough, but with an important caveat about sequence. A pulmonologist is a physician who specializes in diseases of the lungs and the breathing system, including asthma, COPD, interstitial lung disease, lung infections and sleep-related breathing disorders. Cough sits squarely within that remit. In most health systems, though, the pulmonologist is not the first clinician to see a chronic cough; the primary care clinician is.

That ordering is deliberate. Mayo Clinic lists the most common causes of chronic cough as postnasal drip, asthma, gastroesophageal reflux disease (GERD), chronic bronchitis, lingering infection and a class of blood pressure medicines called ACE inhibitors. Several of those causes are identified by a careful history and a short trial of treatment, both of which a primary care clinician can carry out. Sending every eight-week cough straight to a lung specialist would clog specialist clinics with people whose cough was coming from their nose or stomach.

Where the pulmonologist earns the referral is when the picture is unclear or worrying: abnormal findings on a chest X-ray, breathing tests that suggest obstruction, a cough that has not responded to first-line approaches, or warning signs such as blood in the sputum. Pulmonologists also have access to tests that primary care typically does not run in the office, including full lung function testing and bronchoscopy, a procedure in which a thin flexible camera is passed into the airways.

So the practical answer to “does a pulmonologist treat chronic cough” is this: a pulmonologist leads the evaluation of coughs that have resisted the basic workup or that carry red flags, and manages the lung conditions that turn up along the way. For many people the pathway to that specialist runs through primary care first, and that is a feature of good organization rather than a delay.

Which doctor is best for a severe or persistent cough?

People searching for which doctor is best for a severe cough usually want a single name. The honest answer depends on what the cough is doing and what has already been tried.

Primary care is the right first stop for almost everyone. Your family physician, internist or nurse practitioner takes the history, listens to your chest, checks whether you take an ACE inhibitor, asks about heartburn and nasal symptoms, and decides whether a chest X-ray is warranted. The NHS advises seeing a GP for any cough lasting more than three weeks, which places that first visit well before the chronic threshold.

A pulmonologist becomes the central figure when lung disease is suspected or when the cough has outlasted a reasonable primary care workup. An otolaryngologist, the ear, nose and throat specialist, enters when the upper airway seems to be the driver: persistent postnasal drip, sinus disease, voice changes, or a sensation of something stuck in the throat. A gastroenterologist, who specializes in the digestive tract, may be involved if reflux is suspected but has not responded to initial measures, or if testing of acid exposure is being considered. An allergist evaluates environmental triggers and allergic airway inflammation.

Some centers organize these specialists into a multidisciplinary cough clinic so that one referral covers several perspectives. Where that structure exists, the pulmonologist often coordinates it. Where it does not, the primary care clinician plays that coordinating role, sequencing referrals so that one question is answered before the next is asked.

For a severe cough, meaning one that causes vomiting, fainting, rib pain, incontinence or sleep loss, the urgency changes but the logic does not. Severe symptoms justify a faster appointment and a lower threshold for imaging, and often an earlier specialist referral, yet the first evaluation still happens where you can be seen soonest.

How lung disease evaluation is organized: the stepwise pathway

Chronic cough evaluation follows a logic that is easy to miss when you are the one coughing. Rather than running every test at once, clinicians work through the most likely causes in order of probability and ease of testing, confirming or excluding each before moving on. Mayo Clinic’s description of diagnosis reflects this: a detailed history and examination, then imaging, then lung function tests, then more invasive studies only if the earlier steps have not yielded an answer.

Step one is the history. When did the cough start, and did an infection precede it? Is it worse lying down, after meals, at night, in cold air, or after laughing? Does anything come up? Do you smoke, or did you? What medicines do you take? Do you have heartburn, a drippy nose, wheeze? These questions do more diagnostic work than any single scan.

Step two is the physical examination and a chest X-ray. Imaging is not mandatory for every cough, but it is widely used at this stage because it screens for the conditions nobody wants to miss: pneumonia, fluid, masses, scarring.

Step three is targeted treatment trials. If the history points to postnasal drip, a course of treatment for that is tried and the cough is reassessed. If asthma is plausible, breathing tests are done and inhaled therapy may be trialed. If reflux fits, lifestyle changes and acid suppression are tested over several weeks. Each trial is both a treatment and a diagnostic test, since a cough that disappears tells you what caused it.

Step four, when those trials fail or when early findings are abnormal, is specialist evaluation. This is where the pulmonologist for chronic cough comes in with full lung function testing, CT imaging, and sometimes bronchoscopy. Understanding that this is step four, not step one, helps explain why a referral can take time and why that time is usually well spent.

Can lung disease cause chronic cough? The conditions a pulmonologist looks for

Lung disease can absolutely cause chronic cough, and ruling it in or out is the pulmonologist’s central task. The list is long, but a few conditions account for most of the lung-based cases.

Asthma is the most frequent. Many people picture asthma as wheezing and breathlessness, yet in a variant known as cough-variant asthma, cough is the only symptom. The airways are inflamed and twitchy, and breathing tests may be normal between flares, which is why clinicians sometimes use a bronchial challenge test, a controlled inhalation of a substance that provokes narrowing in sensitive airways, to unmask it.

COPD and chronic bronchitis typically produce a daily productive cough in people with a long smoking history or heavy exposure to smoke and dust. Spirometry, the breathing test that measures how much air you can force out and how fast, confirms the airflow obstruction.

Bronchiectasis is a condition in which the airways become permanently widened and scarred, trapping mucus and inviting repeated infection. Its hallmark is a persistent cough with large volumes of sputum. A CT scan is the standard way to identify it.

Interstitial lung disease is a group of conditions that cause scarring in the lung tissue itself rather than the airways. The cough is usually dry and accompanied by breathlessness on exertion; fine crackles on examination and characteristic CT patterns point toward it.

Infections such as tuberculosis and pertussis (whooping cough) cause prolonged cough. The CDC notes that pertussis coughing fits can last for up to ten weeks or more, which is why it should be considered even in vaccinated adults. Lung cancer is on the list too, though it is an uncommon cause of chronic cough overall; it is the reason imaging is done early for smokers and former smokers and for anyone with weight loss or blood in the sputum.

Eosinophilic bronchitis, an airway inflammation marked by a specific type of white blood cell but without the airway narrowing of asthma, rounds out the common lung causes and responds to similar inhaled treatment.

The non-lung causes a lung specialist still has to rule out

Here is a fact that surprises many people who have waited weeks for a pulmonology appointment: the most common causes of chronic cough in non-smokers with a normal chest X-ray are not lung diseases at all. A good pulmonologist knows this and evaluates for them, even though they fall outside the lungs.

Upper airway cough syndrome, the current name for postnasal drip, happens when mucus from the nose or sinuses trickles down the back of the throat and triggers the cough reflex. Allergic rhinitis, chronic sinusitis and non-allergic rhinitis can all drive it. The clue is often a feeling of needing to clear the throat, a drippy or blocked nose, and a cough that worsens when lying flat.

Gastroesophageal reflux disease is the second non-lung heavyweight. Stomach acid, or sometimes non-acid stomach contents, rises into the esophagus and either irritates the lower airway directly through small aspirated amounts or triggers cough through shared nerve pathways. Heartburn is not always present. Mayo Clinic notes that reflux-related cough can occur without any digestive symptoms, which makes it easy to overlook.

ACE inhibitors, a class of blood pressure medicines, cause a dry cough in a meaningful minority of people who take them. The mechanism involves the build-up of a substance called bradykinin in the airways. The cough can begin weeks or even months after starting the medicine, which is why patients and clinicians do not always connect the two. If you take one, mention it; only your prescribing clinician should decide whether to change it, and the cough usually settles over weeks after a switch, not days.

Less common contributors include obstructive sleep apnea, heart failure, and habit or psychogenic cough. When the lungs look healthy, these are where the pulmonologist’s attention turns next, often in partnership with other specialists.

Who is usually referred to a pulmonologist for chronic cough, and who is asked to wait

Referral decisions are not arbitrary. Across guideline bodies, the people who move promptly to a pulmonologist share a few features, and the people who are asked to continue with primary care management share others.

Prompt referral is usual when the chest X-ray is abnormal; when spirometry shows obstruction or restriction that needs characterizing; when there is coughing up of blood, unexplained weight loss, night sweats or persistent fever; when the person has a significant smoking history and the cough has changed character; when breathlessness accompanies the cough; or when a known lung condition such as COPD, bronchiectasis or interstitial lung disease is already on the record and the cough has worsened. Recurrent chest infections, particularly with heavy sputum, also tend to earn a specialist look.

People asked to wait, in the sense of completing a primary care workup first, typically have a normal chest X-ray, no red flags, and a history that points toward one of the common treatable causes. For them the next step is usually a treatment trial for postnasal drip, asthma or reflux, each assessed over several weeks. If the cough settles, the question is answered without a specialist. If it does not, the referral follows with useful information already gathered.

Waiting does not mean being dismissed. Each trial narrows the list, and a pulmonologist receiving a referral after three failed trials starts far closer to an answer than one receiving a referral after none. It also does not mean sitting silently if things change; new symptoms during a treatment trial should prompt a return visit, not a wait for the next scheduled check.

Children follow a slightly different pathway. Mayo Clinic’s four-week threshold for chronic cough in children, and the different list of likely causes in that age group, mean that a persistent childhood cough is often evaluated by a pediatrician first and, where needed, a pediatric pulmonologist.

What happens at the first pulmonology visit

The first appointment is mostly conversation. Expect the pulmonologist to retake your history from the beginning rather than relying on the referral letter, because details that seemed unimportant to you often matter: a childhood diagnosis of asthma that was never followed up, a job that involved dust, a bird kept years ago, a parent with lung scarring. Bring a list of every medicine and supplement you take, and a note of when the cough started and how it has changed.

The examination includes listening to your chest for wheeze and crackles, looking at your throat and nose, checking your fingers for clubbing (a change in nail shape associated with some lung conditions), and often measuring oxygen saturation with a finger probe. None of this hurts.

Spirometry is frequently done during or just after the first visit. You breathe into a mouthpiece connected to a machine, taking the deepest breath you can and blowing out as hard and as long as possible, usually repeated three times to confirm consistency. The NHS describes the test as taking around 30 to 90 minutes including preparation and any repeat measurement after an inhaled bronchodilator, a medicine that relaxes airway muscles. You may be asked to avoid inhalers for a set period beforehand; the clinic will tell you exactly what to do.

If a recent chest X-ray is on file, the pulmonologist reviews it with you. If not, one may be ordered, or the specialist may move directly to a CT scan when the history warrants it.

Before you leave, you should have a working list of what the pulmonologist thinks is most likely, what tests are being ordered and why, and what you should do if symptoms worsen before the next contact. Ask for that summary if it is not offered. A good visit ends with a plan, even if it does not yet end with an answer.

The tests used in lung disease evaluation, and what each one is for

A pulmonologist’s toolkit for chronic cough ranges from the simple to the invasive. Understanding what each test answers helps make sense of why one is ordered and another is not.

Test	What it involves	What it helps answer
Chest X-ray	A quick, low-dose image of the lungs and heart	Screens for pneumonia, fluid, masses, obvious scarring
Spirometry	Forced breathing into a mouthpiece, often before and after a bronchodilator	Detects airway obstruction (asthma, COPD) or restriction
Full lung function tests	Spirometry plus lung volumes and gas transfer, done in a lab	Characterizes interstitial disease, emphysema, restriction
Bronchial challenge	Inhaling a provoking agent in graded steps with repeat spirometry	Unmasks twitchy airways when resting spirometry is normal
Exhaled nitric oxide	A gentle exhale into a handheld analyzer	Indicates eosinophilic airway inflammation
CT scan of the chest	Detailed cross-sectional imaging	Finds bronchiectasis, interstitial changes, small nodules
Sputum tests	Laboratory analysis of coughed-up mucus	Identifies infection or inflammatory cell types
Bronchoscopy	A flexible camera passed into the airways under sedation	Inspects airways directly, samples tissue or fluid
Reflux testing	A thin probe measuring acid exposure over 24 hours	Confirms or excludes reflux when trials are inconclusive

Not everyone needs every row. Mayo Clinic describes imaging and lung function tests as the usual next steps after history and examination, with bronchoscopy and reflux studies reserved for cases where earlier results are unclear. Order matters: the less invasive tests come first, and each result shapes whether the next is needed.

Two practical notes. Spirometry depends on effort, so a technician will coach you through it, and a poor first attempt is normal rather than a sign something is wrong. CT scans involve more radiation than a plain X-ray, which is one reason they are not the default opening move for every cough; your pulmonologist weighs that against the information the scan would provide.

Treatment trials: how clinicians test a theory one cause at a time

One of the least understood parts of chronic cough care is that treatment often doubles as diagnosis. When the history suggests a likely cause but no test can confirm it outright, clinicians treat that cause for a defined period and watch what the cough does. This is sometimes called empiric treatment, meaning treatment based on the most probable explanation rather than on proof.

For suspected upper airway cough syndrome, that usually means addressing nasal inflammation and drainage; the classes involved include antihistamines and nasal corticosteroid sprays. Improvement over a few weeks supports the diagnosis.

For suspected asthma or eosinophilic bronchitis, inhaled corticosteroids, which reduce airway inflammation, are trialed. Mayo Clinic notes that these inhaled medicines are a mainstay for asthma-related cough. A meaningful response typically takes weeks rather than days, so stopping early because nothing happened in the first few days can produce a false negative.

For suspected reflux, the trial combines lifestyle measures (raising the head of the bed, avoiding late meals, reducing trigger foods) with acid-suppressing medicines such as proton pump inhibitors, which reduce stomach acid production. Reflux-related cough is slow to respond, and clinicians commonly allow several weeks to months before judging the trial.

For a suspected ACE inhibitor cough, the only test is to have the prescribing clinician switch to a different class of blood pressure medicine and wait. Resolution usually takes weeks.

Two rules make this process work. First, change one thing at a time; if you start three treatments at once and the cough improves, nobody knows which one helped, and you may end up on medicines you do not need. Second, decisions about starting, continuing or stopping any of these medicines belong to the prescribing clinician, who weighs them against everything else in your health picture. Your role is to report honestly what the cough did, including when it did nothing at all. That negative result is just as informative as a positive one.

What is the newest treatment for chronic cough? Refractory and unexplained cough

A proportion of people complete the full pathway, have every common cause treated, and still cough. When a thorough evaluation has found and treated all identifiable causes without the cough resolving, clinicians use the term refractory chronic cough. When no cause is found at all, the term is unexplained chronic cough. Both share a proposed mechanism: the cough reflex itself has become oversensitive, firing in response to triggers that would not bother most people, such as talking, cold air, perfume or a change in posture. This concept is sometimes called cough hypersensitivity.

The newest treatment for chronic cough reflects that thinking. A class of medicines called P2X3 receptor antagonists is designed to block a signaling pathway on the sensory nerves in the airway that helps trigger the cough reflex. In clinical trials these medicines reduced cough frequency compared with placebo in people with refractory chronic cough, and the most frequently reported side effect was altered or reduced taste. Regulatory status varies by country, with approval in some regions and not others, and long-term data are still accumulating. That is what the evidence shows: a promising mechanism with real trial support, not a universal fix.

Other approaches for refractory cough include neuromodulator medicines, drugs originally developed for nerve pain or seizures that dampen overactive nerve signaling and are used off-label for cough in some settings, with side effects such as drowsiness that limit their use. Non-drug treatment also has evidence: speech and language therapy techniques that teach cough suppression, breathing control and laryngeal hygiene have been shown in trials to reduce cough frequency and improve quality of life.

Whether any of these is appropriate for a given person is a decision for the treating pulmonologist, made only after the standard pathway has been completed. Reaching for the newest medicine before postnasal drip, asthma and reflux have been properly addressed is a common way to miss a treatable cause.

What the following weeks usually look like after a referral

The weeks after a pulmonology referral tend to follow a recognizable shape, even though the details vary with the suspected cause.

The first stretch is often about tests. Spirometry may happen at the first visit; a CT scan, if ordered, is usually scheduled separately and read within days. Bronchoscopy, when needed, is a planned procedure with its own preparation instructions and a short recovery, typically a few hours of observation and a sore throat for a day or two.

The second stretch is the treatment trial, and this is where patience is tested. Inhaled corticosteroid trials for suspected asthma are commonly assessed over several weeks; reflux treatment trials are often run for eight weeks or longer before a judgment is made; a cough from an ACE inhibitor typically fades over the weeks following a change in medicine. Mayo Clinic’s guidance on treatment reflects these multi-week timelines rather than rapid turnaround. Many clinics ask patients to keep a simple cough diary during this period, noting frequency, triggers and sleep disruption, because memory is unreliable and a diary turns “I think it is a bit better” into usable information.

The third stretch is review. The pulmonologist looks at the test results and the trial response together and either confirms a diagnosis and sets a longer-term plan, or moves to the next hypothesis. For some people the whole process wraps up within a couple of months. For others, particularly those who end up in the refractory category, it takes longer, and the plan shifts from finding a single cause to managing an oversensitive reflex.

Throughout, the realistic expectation is gradual improvement rather than an overnight stop. A cough that has been present for months has often trained the airway nerves to fire easily, and calming that pattern takes time even after the original trigger is handled.

What people often get wrong about chronic cough

Myths cluster around chronic cough, partly because the symptom is so common and partly because everyone has an opinion about it. A few deserve correcting.

“A cough that lasts this long must be something serious.” Most chronic coughs in people with a normal chest X-ray are caused by postnasal drip, asthma or reflux, none of which is life-threatening and all of which are treatable. Serious lung disease is on the list, which is why red flags are checked, but duration alone does not make it likely.

“If the X-ray is normal, my lungs are fine.” A plain X-ray misses early interstitial disease, mild bronchiectasis and small nodules. A normal X-ray is reassuring, not conclusive, which is why spirometry and sometimes CT follow when symptoms persist.

“Cough medicine should fix it.” Over-the-counter cough suppressants are designed for short-lived coughs from colds. The NHS points out there is little evidence they help, and they do nothing about the underlying cause of a chronic cough. Treating the cause is what works.

“I do not have heartburn, so it cannot be reflux.” Reflux can trigger cough through nerve pathways without any burning sensation, and Mayo Clinic specifically notes that reflux-related cough can occur without classic digestive symptoms.

“I only cough, so it is not asthma.” Cough-variant asthma exists precisely because cough can be the only symptom.

“The medicine I have taken for years cannot be causing it.” ACE inhibitor cough can begin months after starting the medicine. Only your prescribing clinician should change it, but it should be on the table.

“Seeing a pulmonologist first will speed things up.” In practice, arriving at a specialist with a completed primary care workup usually saves time, because the specialist begins with three causes already excluded.

“Nothing can be done for a cough with no cause.” Refractory and unexplained cough now have an evidence base of their own, including behavioral therapy and newer medicine classes under specialist supervision.

Questions to ask your care team about a pulmonologist for chronic cough

Appointments are short and coughs are complicated. Walking in with a handful of focused questions makes the time count, whether you are seeing your primary care clinician or a pulmonologist for chronic cough.

• Based on my history, which cause do you think is most likely, and which are you trying to rule out?
• Do I need a chest X-ray or breathing tests at this stage, and if not, what would make you order them?
• Could any of my current medicines be contributing to the cough?
• If you are suggesting a treatment trial, how long should I give it before we judge whether it worked, and what should I track in the meantime?
• What symptoms should bring me back before the next scheduled review?
• At what point would you refer me to a pulmonologist, or to an ear, nose and throat or digestive specialist?
• If I am being referred, what information will the specialist receive, and is there anything I should bring?
• Are there lifestyle changes that could help regardless of the final diagnosis, such as changes to sleeping position, meal timing or exposure to irritants?
• If tests show a lung condition, who will coordinate my care going forward?
• If no cause is found after the full workup, what options exist for managing the cough itself?

Two habits make the answers more useful. Write them down during the visit, or ask whether a summary will be available afterward. And be candid about what you have already tried, including over-the-counter products, home remedies and anything you borrowed from a family member’s cabinet; clinicians cannot interpret a treatment response they do not know about.

Finally, ask what the plan is if the first theory turns out to be wrong. Chronic cough evaluation often involves more than one hypothesis, and knowing in advance that a failed trial is a step forward rather than a dead end makes the process far less discouraging.

When to call your doctor

Most chronic coughs can be evaluated at a scheduled appointment. Some symptoms should not wait for one. Mayo Clinic and the NHS both highlight a consistent set of red flags that warrant prompt medical attention, and in some cases emergency care.

Contact your doctor promptly, or seek urgent care, if you notice any of the following alongside your cough:

• Coughing up blood, even small streaks, or sputum that is rust-colored
• Shortness of breath that is new, worsening, or present at rest
• Chest pain, particularly if it is sharp, persistent, or worse on breathing in
• Unexplained weight loss
• Fever that persists for more than a few days, or drenching night sweats
• A cough that causes you to vomit, faint, or lose control of your bladder
• Hoarseness or voice change lasting more than three weeks
• Swelling in your legs or ankles together with breathlessness
• Difficulty swallowing or a sensation of food sticking

Call emergency services if you develop severe breathlessness, blue or gray lips or fingertips, confusion, or coughing up more than a small amount of blood. These are not symptoms to monitor at home.

Even without red flags, the NHS advises seeing a GP for any cough lasting longer than three weeks, and sooner if you have a weakened immune system, a long smoking history, or a known lung or heart condition. Persistent cough in a child that lasts beyond four weeks should also be assessed.

If you are already under evaluation and a treatment trial is underway, do not wait for the next scheduled review if any of the symptoms above appear, or if the cough changes character suddenly. Reporting a change early allows your treating team to adjust the plan. Every decision about testing and treatment rests with that team, but they can only act on what they know, and you are the person best placed to tell them.

Frequently asked questions

Does a pulmonologist treat chronic cough?

Yes, pulmonologists evaluate and treat chronic cough, particularly when lung disease is suspected or when the cough has not responded to the standard primary care workup. In most health systems the primary care clinician sees the cough first, checks for common causes such as postnasal drip, asthma, reflux and medicine side effects, and refers to a pulmonologist when tests are abnormal, red flags appear, or initial treatment trials fail.

Which doctor is best for a severe cough?

Start with primary care, which can assess urgency, order a chest X-ray and begin treatment. A pulmonologist leads when lung disease is suspected, an ear, nose and throat specialist when the upper airway is the likely source, and a gastroenterologist when reflux resists initial treatment. Severe symptoms such as vomiting, fainting or breathlessness justify a faster appointment and often an earlier referral, but the first evaluation should happen wherever you can be seen soonest.

Can lung disease cause chronic cough?

Lung disease is a recognized cause of chronic cough, including cough-variant asthma, COPD and chronic bronchitis, bronchiectasis, interstitial lung disease, infections such as pertussis and tuberculosis, and, less commonly, lung cancer. A pulmonologist uses spirometry, imaging and sometimes bronchoscopy to identify these. That said, in non-smokers with a normal chest X-ray, non-lung causes such as postnasal drip and reflux are more frequent.

What is the newest treatment for chronic cough?

The newest approach targets the oversensitive cough reflex itself in people whose cough persists after all identifiable causes have been treated. A class of medicines called P2X3 receptor antagonists blocks a nerve-signaling pathway involved in triggering cough; trials showed reduced cough frequency versus placebo, with taste disturbance as the common side effect. Approval varies by country, and these medicines are considered only after standard evaluation, under specialist supervision.

How long should I wait before seeing a pulmonologist for a cough?

There is no fixed waiting period; the trigger is the clinical picture. The NHS advises seeing a GP for any cough lasting more than three weeks. If the X-ray is abnormal, breathing tests show obstruction, or red flags such as blood in the sputum are present, referral to a pulmonologist is usually prompt. If findings are normal and a common cause is suspected, a primary care treatment trial of several weeks typically comes first.

What tests will a pulmonologist do for a chronic cough?

Expect a detailed history and examination, then spirometry to measure airflow, often repeated after an inhaled bronchodilator. A chest X-ray is reviewed or ordered, and a CT scan may follow if bronchiectasis or interstitial disease is suspected. Further tests such as a bronchial challenge, exhaled nitric oxide, sputum analysis, bronchoscopy or 24-hour reflux monitoring are reserved for cases where earlier results do not explain the cough.

Can a chronic cough be caused by acid reflux without heartburn?

Yes. Reflux can trigger cough through nerve pathways shared by the esophagus and airway, or through tiny amounts of stomach contents reaching the throat, without producing any burning sensation. Mayo Clinic notes that reflux-related cough can occur without classic digestive symptoms. Because of this, clinicians often trial reflux treatment and lifestyle changes even when heartburn is absent, judging the response over several weeks.

Can blood pressure medicine cause a chronic cough?

A class of blood pressure medicines called ACE inhibitors causes a dry, tickly cough in a meaningful minority of people, through a build-up of a substance called bradykinin in the airways. The cough can start weeks or months after the medicine begins. Only the prescribing clinician should decide whether to switch to another class; if a change is made, the cough typically settles over the following weeks.

What is a cough clinic and do I need one?

A cough clinic is a specialist service, often led by a pulmonologist, that brings together lung, ear, nose and throat, digestive and speech therapy expertise for people whose cough has not been explained by standard evaluation. Most people with chronic cough do not need one, because primary care and a single specialist resolve the question. Referral to a dedicated clinic is usually reserved for refractory or unexplained cough.

What are the warning signs that a chronic cough is serious?

Seek prompt medical attention for coughing up blood, new or worsening breathlessness, chest pain, unexplained weight loss, persistent fever or night sweats, hoarseness lasting more than three weeks, or a cough that causes vomiting or fainting. Emergency care is needed for severe breathlessness, blue or gray lips, confusion, or more than a small amount of blood. Without these signs, most chronic coughs can be evaluated at a scheduled appointment.

References

• NHS: Cough
• NHS: Spirometry
• MedlinePlus: Cough
• CDC: About Whooping Cough (Pertussis)

This article is for general information only and is not a substitute for professional medical advice. Please consult a qualified doctor about your individual situation.