Does Acute Bronchitis Need a Chest X-Ray? How Doctors Rule Out Pneumonia

It is a little after two in the morning, and the coughing has started again. Eleven days in, the fever is long gone, but each fit ends with that raw, scraped feeling behind the breastbone. A partner, half awake, asks the question that has been circling for a week: should the doctor have ordered an X-ray? The search bar fills in the rest, and “acute bronchitis chest x ray” returns a wall of answers that mostly contradict one another.

The honest answer is less dramatic than the internet makes it sound. Bronchitis lives in the airways, the branching tubes that carry air into the lungs, and an X-ray is poor at seeing inflammation in those tubes. What the image does well is catch pneumonia, which lives one level deeper, in the air sacs themselves.

So the real question a clinician is asking is not “does this cough look like bronchitis?” but “is there any reason to suspect this is something else?” That shift explains almost every decision about imaging that follows.

What does a chest X-ray actually show, and what does acute bronchitis look like on it?

A chest X-ray is a still photograph made with a brief pulse of radiation that passes through the body onto a detector. Dense tissue such as bone blocks the beam and appears white; air lets it through and appears black. A healthy lung, being mostly air, looks dark and finely textured, with the heart and ribs standing out as pale shapes around it. MedlinePlus describes the test as one of the most common imaging studies in medicine, partly because it is fast and partly because it answers a surprising number of questions at once: heart size, fluid around the lungs, a collapsed segment, a mass, a broken rib.

Acute bronchitis is inflammation of the lining of the bronchi, the medium-sized tubes that branch from the windpipe. The lining swells, produces extra mucus, and becomes irritable, which is why the cough can be triggered by a laugh or a breath of cold air. Those changes are measured in fractions of a millimeter. They do not block enough of the beam to show up, so the X-ray of someone with uncomplicated bronchitis is, in the great majority of cases, read as normal.

Pneumonia behaves differently. The infection fills the alveoli, the tiny air sacs at the ends of the airway tree, with fluid and inflammatory cells. Air is replaced by something denser, and the affected region turns white or hazy on the film. Radiologists call this consolidation. It can occupy a single lobe, several patches, or, less often, both lungs.

That contrast is the whole logic of ordering the test. A chest X-ray does not confirm bronchitis; it looks for the things bronchitis is not. A normal film is reassuring because of what is absent, and clinicians order it when the chance of finding something present has risen enough to matter.

Does acute bronchitis need a chest X-ray? What the guidelines actually say

For an otherwise healthy adult with a typical chest cold, the mainstream answer is no. Mayo Clinic notes that bronchitis is usually diagnosed from symptoms and a physical exam, and that a chest X-ray is used when a clinician wants to rule out pneumonia or another explanation for the cough. The NHS gives the same picture: a GP will usually ask about symptoms and listen to the chest, with tests reserved for when the diagnosis is uncertain or the illness is not following the expected course.

The reasoning is practical rather than dismissive. In the first days of a viral chest infection, the probability of pneumonia in someone with normal vital signs and a clear-sounding chest is low. A normal X-ray in that setting changes nothing about care. It costs the patient a trip, a wait and a small radiation exposure, and it occasionally turns up an incidental shadow that leads to further scans for something that was never going to cause harm. Guideline writers in both the United States and the United Kingdom have therefore converged on a selective approach: image when specific findings raise suspicion, not as a routine step.

What counts as suspicion is covered in detail below, but the headline items are consistent across sources: fever that is high or persistent, a heart rate or breathing rate that is faster than expected, oxygen levels below the normal range, focal sounds over one part of the lung, a cough that has run past about three weeks, and any patient whose age or underlying health makes a missed pneumonia more dangerous.

None of this means a patient who asks about an acute bronchitis chest X-ray is being unreasonable. It means the clinician is weighing a probability, and the exam in the room usually supplies most of the information needed to weigh it.

Bronchitis vs pneumonia symptoms: how doctors tell them apart at the bedside

Before anyone reaches for imaging, the distinction is made with a thermometer, a pulse oximeter, a stethoscope and a careful history. The table below summarizes the patterns clinicians weigh. It is a map of what shifts the odds, not a tool for diagnosing yourself at home; plenty of pneumonias are quiet, especially in older adults, and plenty of bronchitis cases feel dreadful.

Feature	More typical of acute bronchitis	Raises concern for pneumonia
Where the problem sits	Lining of the bronchi (airway tubes)	Alveoli (air sacs) filling with fluid
Onset	Follows a head cold over a few days	Can develop suddenly over 24–48 hours (NHS)
Fever	Absent or low grade, settles early	Higher, persistent, often with shaking chills or sweats
Breathing	Comfortable at rest between coughing fits	Fast or labored breathing, breathless at rest
Chest sounds	Wheeze or scattered noises that clear after a cough	Crackles fixed over one area, reduced breath sounds
Oxygen saturation	Usually in the normal range	May be reduced
How the person looks	Unwell but functioning	Ill-appearing, drowsy or confused (especially older adults)
Chest pain	Soreness from coughing, muscular	Sharp pain on breathing in, localized to one side

Two of these rows carry more weight than the others. Focal findings, meaning something audible or painful in one specific place rather than spread across the chest, point toward a localized process in the air sacs. And oxygen saturation, measured with a fingertip clip, is a number that bronchitis rarely disturbs in a healthy adult. When both are normal and the vital signs are steady, most guidelines regard pneumonia as unlikely enough that imaging can wait.

Who is usually offered an acute bronchitis chest X-ray, and who is asked to wait

Clinicians think about this in two layers: what the illness looks like right now, and how much harm a missed pneumonia would do in this particular person.

The first layer is the one in the table above. A temperature that stays high, a pulse or breathing rate that is climbing, an oxygen reading below the expected range, crackles over one lung field, or pain that sharpens with each breath all push toward imaging. So does a change in trajectory: someone who was improving and then worsens, or whose fever returns after several clear days, is describing a pattern that bronchitis does not usually follow.

The second layer is about vulnerability. Older adults, and NHS guidance treats roughly 65 as the age where pneumonia risk and severity rise, are more likely to be imaged on softer evidence, partly because their fever and chest signs can be muted. People with chronic lung disease such as COPD or asthma, heart failure, diabetes, kidney disease, or a weakened immune system from illness or medication fall into the same group. Infants and very young children are assessed on their own pathway, where breathing effort and feeding matter more than any single number.

Who is usually asked to wait? A healthy adult or older child, within the first two to three weeks of a cough that followed a cold, with normal vital signs and a chest that sounds clear or merely wheezy. For that person, the CDC and NHS both describe a self-limiting illness, and the right next step is a plan for what would prompt a return visit rather than a trip to radiology. Waiting is not the same as being dismissed; it is a judgment that the odds are low, paired with a safety net. The treating team makes that call, and it can be revisited the moment the picture changes.

What happens during a chest X-ray, and is the radiation a worry?

The appointment itself is one of the simplest in medicine. You remove jewelry and anything metallic above the waist, change into a gown if clothing has fasteners, and stand with your chest against a flat detector. The technologist asks you to take a deep breath and hold it so the lungs are fully expanded and the diaphragm sits low. The exposure lasts a fraction of a second. Most adult studies include two pictures, one from the back and one from the side, and the whole visit, from arrival to walking out, usually takes a matter of minutes. There are no needles, no contrast dye and no recovery time.

A radiologist, a doctor who specializes in reading medical images, interprets the film. In urgent care and emergency settings the report is often available while you wait; in outpatient clinics it may be sent to the ordering clinician later the same day or the next.

On radiation: MedlinePlus describes the dose from a standard chest X-ray as very small, among the lowest of any imaging test, and notes that the benefit of finding a treatable problem generally outweighs it when the test is clinically indicated. The concern is not any single film but the habit of ordering films that were never going to change care, which is one reason guidelines favor a selective approach.

Pregnancy deserves a specific mention. The developing baby sits well outside the chest beam, and shielding can be used, but staff should always be told about a known or possible pregnancy so the decision can be made deliberately. Alternatives exist for particular situations: bedside lung ultrasound in some emergency departments, or a CT scan (a detailed cross-sectional X-ray study) when the plain film is inconclusive, though CT involves a considerably higher dose and is reserved for cases where that detail is needed.

What else doctors use besides the X-ray to rule out pneumonia

The stethoscope remains the central instrument, and what the clinician is listening for is location as much as sound. Wheeze, a musical whistle on breathing out, suggests narrowed airways and fits bronchitis or asthma. Crackles, a fine popping like hair rubbed between fingers, heard persistently over one region, suggest fluid in the air sacs. A patch where breath sounds seem dull or distant can mean consolidation or fluid around the lung.

Vital signs do a great deal of quiet work. Temperature, pulse, breathing rate and blood pressure are checked at every visit for a reason: together they describe how hard the body is working to cope. Pulse oximetry, the fingertip clip that estimates oxygen in the blood, is the single number most likely to change a decision, because a drop below the normal range in someone without known lung disease is not a bronchitis finding.

Laboratory tests have a narrower role. Swabs for influenza, COVID-19 or RSV are sometimes taken because a positive result changes advice about isolation and, in certain patients, treatment. A test for pertussis (whooping cough) is considered when the cough has a particular quality or there has been exposure. In some health systems a finger-prick blood test for C-reactive protein, a marker of inflammation, is used in primary care to help decide whether pneumonia is likely enough to treat; NICE guidance in the UK describes this approach for adults where the diagnosis is unclear.

One thing that does not help is mucus color. Yellow or green phlegm reflects immune cells doing their job and is seen in viral infections every day; Harvard Health and the CDC both make the point that color alone does not indicate bacteria or a need for antibiotics. Spirometry, a breathing test, may come later if wheeze lingers and asthma is suspected, but it is not a tool for the acute visit.

Which is more serious, bronchitis or pneumonia?

Pneumonia, and the gap is wide. The difference comes down to anatomy. Bronchitis irritates the tubes that carry air; the air still reaches the sacs where oxygen crosses into the blood, so gas exchange is largely preserved. Pneumonia floods those sacs. Blood passing through an affected region picks up less oxygen, the body compensates with faster breathing and a higher heart rate, and in severe cases the infection spills into the bloodstream. The NHS lists pneumonia among the infections that can lead to sepsis and describes it as potentially life-threatening, particularly in older adults, young children and people with existing illness.

Acute bronchitis, by contrast, is described by the CDC as a chest cold that almost always resolves on its own without specific treatment. Hospital admission for uncomplicated bronchitis in a healthy adult is unusual. The illness is miserable, loud and disruptive to sleep, but it is rarely dangerous.

There are two important qualifications. First, in people with COPD or asthma, a viral bronchitis can trigger a flare of the underlying condition, with real breathlessness and sometimes a need for urgent care. For them the label “just bronchitis” undersells the risk, and clinicians treat the exacerbation rather than the infection. Second, the two conditions are not mutually exclusive. A small proportion of chest colds progress to pneumonia, which is why a cough that worsens after a period of improvement, or a fever that returns, is taken seriously rather than filed under lingering symptoms.

Seriousness is also about who is sick. A mild pneumonia in a fit 30-year-old may be managed entirely at home, while a vigorous bronchitis in a frail 85-year-old can tip them toward dehydration and confusion. The condition sets the baseline; the person sets the stakes.

Is acute bronchitis contagious, and for how long?

The infection behind it usually is. Acute bronchitis in otherwise healthy people is almost always caused by the same viruses that cause colds and flu: rhinoviruses, influenza, RSV, parainfluenza and seasonal coronaviruses among them. The CDC describes it plainly as a chest cold. Those viruses spread through droplets released when an infected person coughs, sneezes or talks, and through hands that touch a contaminated surface and then the face.

What is contagious is the virus, not the diagnosis. Two people can catch the same virus from the same child’s birthday party, and one develops a sore throat and runny nose while the other develops a two-week cough with chest soreness. Whether the illness settles in the nose or travels down to the bronchi depends on the individual, their airways and some luck. So the person with bronchitis is roughly as infectious as anyone with that particular cold, which generally means most contagious in the early days when symptoms are at their worst and fever may be present.

The lingering cough tells a different story. By the second and third week, most of the active infection has been cleared by the immune system; what remains is an airway lining that is healing and remains irritable, firing off coughs at minor provocation. That post-infectious cough is a symptom of recovery rather than a sign that someone is still shedding virus in quantity, although no mainstream source offers a precise day on which contagiousness ends, and respiratory viruses differ from one another.

The practical advice is the ordinary kind. Stay home while feverish or clearly unwell, cover coughs, wash hands, and consider a mask around infants, older relatives or anyone with a weakened immune system. Bacterial causes such as pertussis spread too, and are one reason a cough with a distinctive whooping or vomiting pattern prompts testing.

How long does acute bronchitis last? What the next three weeks usually look like

The arc is more predictable than it feels at the time. In the first two or three days the illness often looks like an ordinary cold: sore throat, congestion, fatigue, perhaps a low fever. The cough then moves center stage, and from roughly day three to day seven it is at its worst, frequently dry at first and then productive, with aching chest muscles from the effort. Sleep suffers. This is the stretch when most people wonder whether something is wrong.

Through the second week, fever and body aches have usually gone, energy returns in patches, and the cough continues, sometimes loosening and bringing up mucus. Mayo Clinic describes general symptoms improving within about a week to ten days while the cough can linger for several weeks afterward. The NHS puts the typical total course at around three weeks for most people, and the CDC says the cough can last up to three weeks or so even when everything is going well.

A minority of people cough for longer. Post-infectious cough, the medical term for an airway that stays twitchy after the virus has cleared, can run for four to eight weeks in otherwise healthy adults, and Harvard Health notes that a cough persisting beyond about eight weeks is classified as chronic and warrants a different conversation. These are typical ranges drawn from population descriptions, not promises about any individual.

The timeline also carries a built-in checkpoint. A cough that is still present at three weeks, or one that has changed character, is the point at which guidelines suggest reassessment, and it is a common reason a chest X-ray is ordered at a follow-up visit rather than at the first. Improvement that stalls, or symptoms that return after fading, deserve a call sooner than that.

What is commonly misdiagnosed as bronchitis?

Bronchitis is a diagnosis of pattern: a cough following a cold, in someone who is otherwise stable, that fades over a few weeks. When the pattern breaks, clinicians widen the lens. The conditions that most often hide behind the label share the same headline symptom and part ways on the details.

Pneumonia sits at the top of the list, which is the entire reason this article exists. Asthma is next; a cough that is worse at night, triggered by cold air or exercise, and that keeps returning with every viral infection may be asthma rather than a run of unlucky bronchitis, and a breathing test after recovery can settle it. In people who smoke or have smoked, a “bronchitis” that recurs each winter can be chronic obstructive pulmonary disease announcing itself, and a persistent new cough in a long-term smoker is one of the symptoms the NHS lists for lung cancer assessment.

Pertussis, or whooping cough, is a bacterial infection that produces prolonged coughing fits, sometimes ending in a gasp or vomiting, and can last for many weeks; it is frequently mistaken for a viral cough in adults whose childhood vaccine protection has waned. Heart failure can present as a cough with breathlessness lying flat and swollen ankles, particularly in older adults. Acid reflux and postnasal drip from sinus inflammation are two of the commonest causes of a cough that outlasts any infection. A cough that begins after starting an ACE inhibitor, a class of blood pressure medicine, is a well-recognized side effect. And a pulmonary embolism, a blood clot in the lung, can masquerade as a chest infection in someone with sudden breathlessness and chest pain.

None of this is a checklist to work through at home. It is the list a clinician holds in mind when a cough refuses to behave like bronchitis, and it is why follow-up matters when the expected timeline slips.

Why antibiotics usually sit on the sidelines, and what helps instead

The X-ray question and the antibiotic question are cousins, and people often ask them in the same breath. Antibiotics work by killing bacteria or stopping them from multiplying; they have no effect on viruses, and the CDC is explicit that acute bronchitis is almost always viral and that antibiotics will not help it. Taking them anyway exposes a person to side effects such as stomach upset, rash and, less often, serious allergic reactions, and contributes to resistance, the process by which bacteria stop responding to the drugs we rely on.

A normal chest X-ray does not, by itself, settle the antibiotic decision, but it removes the most important reason to prescribe one. Where clinicians do consider antibiotics in someone with a bronchitis-like illness, it is usually because the picture suggests pneumonia, because pertussis is suspected or confirmed, or because a patient with COPD is having a flare where guidelines support treatment. Each of those is a judgment for the prescriber, made on the whole picture rather than the cough alone.

What the evidence supports for ordinary acute bronchitis is modest and unglamorous. Rest, fluids, and warm drinks ease the throat and help loosen mucus. The NHS notes that honey can soothe a cough in adults and children over one year old, but should never be given to infants under one because of the risk of botulism. Humidified air or steam from a shower may bring short-term relief. Over-the-counter cough medicines have limited evidence behind them, and the NHS advises checking suitability with a pharmacist, particularly for children and for anyone taking other medicines.

For people who are wheezy, a clinician may consider an inhaled bronchodilator, a class of medicine that relaxes the muscle around the airways; the evidence for benefit in bronchitis without underlying asthma is mixed, and that decision, like all of them, belongs with the treating team.

What people often get wrong about acute bronchitis and chest X-rays

The first misconception is that a chest X-ray confirms bronchitis. It cannot. Bronchitis does not produce a reliable signature on the film; what the X-ray offers is the absence of pneumonia, fluid or a mass. A clinician who says “the X-ray was clear, so this is bronchitis” is really saying “the X-ray ruled out the alternatives I was worried about,” which is a different and more useful statement.

The second is that a cough still present at three weeks means the bronchitis has “turned into” pneumonia. Far more often it means the airway lining is still healing. The NHS and CDC both describe three weeks as a normal duration, and post-infectious cough can outlast that. Duration alone is a reason to be reassessed, not a sign of a new infection; new fever, breathlessness or chest pain are the signs that something has changed.

Third: green or yellow mucus means bacteria and bacteria mean antibiotics. Color reflects the white blood cells the immune system has sent in, and it appears in viral infections every day. Harvard Health has written about this specifically, because it drives a great deal of unnecessary prescribing.

Fourth: bronchitis will become pneumonia if it is not treated. Most bronchitis is never treated with anything beyond rest and time, and most of it never progresses. The small risk of pneumonia is real but is not prevented by antibiotics given early for a viral illness.

Fifth: a normal X-ray settles the matter for good. It is a snapshot. Someone imaged on day four and worsening on day nine is a different clinical situation, and a second look may be entirely appropriate.

Finally, the idea that asking for an X-ray is pushy. Patients are allowed to ask. The useful version of the question is not “can I have one” but “what would make you want one for me,” which turns a request into a shared plan.

Questions to ask your care team

A short consultation goes further when you arrive with specific questions, and the best ones turn a yes-or-no decision into an explanation you can act on. If you are weighing whether an acute bronchitis chest X-ray is needed, these tend to open the right conversations.

• What in my exam today makes pneumonia unlikely, and what finding would change your mind?
• Are there features of my age, medical history or medicines that put me in a higher-risk group?
• Were my oxygen level, pulse and breathing rate in the normal range, and what numbers would concern you?
• If I am not being imaged today, at what point, or with which symptoms, should I come back?
• Is there any reason to test for influenza, COVID-19, RSV or whooping cough in my case?
• If I do have an X-ray, how will I receive the result, and who will explain it to me?
• How long would you expect my cough to last, and what would count as “too long” for me specifically?
• Do I have any signs of asthma or COPD that we should check once this infection has settled?
• What can I safely take to ease the cough and sleep, given my other medicines and health conditions?
• Are there people at home I should take particular care around while I am still coughing?

Write the answers down, or ask whether they can be added to the visit summary. The most valuable thing to leave with is not a film but a clear safety net: a shared understanding of what the next two weeks should look like and exactly what would bring you back through the door. If the clinician has recommended waiting rather than imaging, asking them to walk through their reasoning is reasonable and usually welcomed. Clinicians make these calls many times a day, and most are glad to explain the probability they are weighing rather than leave a patient wondering.

When to call your doctor

Most acute bronchitis resolves without a second visit. The signs below are the ones mainstream sources, including the NHS, Mayo Clinic and CDC, identify as reasons to be reassessed, because they suggest pneumonia, a flare of underlying disease, or a different diagnosis altogether.

Seek emergency care, by calling emergency services or going to an emergency department, for breathlessness at rest or breathing that is noticeably fast and labored; chest pain that is severe or that sharpens with each breath; blue or gray lips or fingertips; coughing up blood in more than streaks; confusion, unusual drowsiness or difficulty staying awake, particularly in an older adult; or any sense that someone is deteriorating quickly.

Call your doctor or an urgent care service the same day for a fever that is high, that lasts more than a few days, or that returns after you had started to improve; a cough that worsens after a period of getting better; new wheeze or tightness that is not relieved by any inhaler you have been prescribed; an inability to keep fluids down; or symptoms in a baby, a frail older adult, or anyone with COPD, asthma, heart failure, diabetes or a weakened immune system, where the threshold for review is lower.

Arrange a routine appointment if the cough has lasted beyond about three weeks, has changed character, keeps returning with every cold, or is accompanied by unexplained weight loss, night sweats or a hoarse voice that does not settle. Smokers and former smokers with a new persistent cough should be seen regardless of how well they otherwise feel.

None of these lists replaces clinical judgment. If you are worried and cannot name why, that is itself a reason to call. The treating team would rather see a cough that turns out to be nothing than miss the one that is not.

Frequently asked questions

How contagious is acute bronchitis?

The viruses that cause it are as contagious as any cold or flu virus, spreading through droplets and contaminated hands, and people are generally most infectious in the first days when symptoms peak. The lingering cough of weeks two and three mostly reflects a healing, irritable airway rather than heavy viral shedding. The CDC describes acute bronchitis as a chest cold, so the usual measures apply: stay home while feverish, cover coughs and wash hands.

Which is more serious, bronchitis or pneumonia?

Pneumonia is considerably more serious. It fills the air sacs with fluid, reduces oxygen exchange and, according to the NHS, can lead to sepsis and be life-threatening in older adults, young children and people with existing illness. Acute bronchitis inflames the airway tubes and almost always resolves on its own. The main exception is in people with asthma or COPD, where a viral bronchitis can trigger a significant flare.

What is commonly misdiagnosed as bronchitis?

Pneumonia is the most important condition hiding behind the label, followed by asthma, COPD, whooping cough, heart failure, acid reflux, postnasal drip, cough caused by ACE inhibitor blood pressure medicines, lung cancer in long-term smokers and, occasionally, a blood clot in the lung. Clinicians widen their search when a cough does not follow the expected pattern of a chest cold that fades over about three weeks.

How long does acute bronchitis last, and when should I worry?

Most people are through it in about three weeks, according to the NHS, with Mayo Clinic noting general symptoms improve within a week to ten days while the cough can linger longer. Some otherwise healthy adults cough for four to eight weeks as the airway settles. A cough still present at three weeks, or one that worsens after improving, is the point at which guidelines suggest being reassessed.

Can a chest X-ray tell bronchitis from pneumonia?

It can identify pneumonia, which shows up as white or hazy consolidation where fluid has replaced air in the lung, but it cannot positively identify bronchitis, which affects the airway lining and leaves the film looking normal. A clear X-ray therefore supports a bronchitis diagnosis by exclusion rather than confirmation, and it is a snapshot of that day only.

Will a chest X-ray be normal if I have acute bronchitis?

Usually, yes. The swelling and mucus in the bronchi are far too subtle to block the X-ray beam, so uncomplicated acute bronchitis produces a normal or near-normal image in the great majority of cases. That is exactly why guidelines do not recommend routine imaging for a typical chest cold: the test is designed to find what bronchitis is not, and in a low-risk patient it rarely does.

Do I need antibiotics if the X-ray is clear?

In most cases a clear X-ray removes the main reason to consider them. The CDC states that acute bronchitis is almost always viral and that antibiotics do not help it, while carrying risks of side effects and resistance. Exceptions, such as suspected whooping cough or a COPD flare, are judged by the prescribing clinician on the whole clinical picture rather than the X-ray alone.

Is a chest X-ray safe during pregnancy?

The radiation dose from a chest X-ray is very small, the beam is directed well away from the abdomen, and shielding can be used, so it is generally considered low risk when clinically needed. Always tell the staff about a known or possible pregnancy so the decision is made deliberately and alternatives such as bedside ultrasound can be considered where appropriate. The final judgment rests with your care team.

What are the key bronchitis vs pneumonia symptoms doctors look for?

Clinicians weigh fever that is high or persistent, breathing that is fast or labored at rest, oxygen saturation below the normal range, crackles fixed over one area of the lung, sharp chest pain on breathing in, and an ill or confused appearance. Bronchitis more often produces wheeze, soreness from coughing and a person who feels unwell but is functioning. These patterns guide the exam; they are not a self-diagnosis checklist.

Should I ask for a chest X-ray if my cough has lasted three weeks?

Asking for a review at three weeks is reasonable and in line with mainstream guidance, which treats that duration as a checkpoint. Whether imaging follows depends on the exam: a persistent cough with normal vital signs and a clear chest may simply be post-infectious, while any fever, breathlessness, focal findings or higher-risk history makes an X-ray more likely. A useful framing is to ask what findings would prompt one for you.

References

• NHS: Bronchitis
• CDC: About Acute Bronchitis (Chest Cold)
• MedlinePlus: Chest X-ray
• NHS: Pneumonia

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.