Before a Dysphagia Evaluation: Fasting Rules, Reflux History and the Reports to Bring

The appointment letter sits on the kitchen table next to a half-finished cup of tea, and one line on it has been read four times: please follow the enclosed instructions. The instructions mention not eating. They do not mention whether the morning heartburn medicine counts, whether a sip of water is allowed, or what to do about the folder of hospital printouts from the stroke ward last spring.

Preparing for a dysphagia evaluation turns out to be less about willpower and more about two things most people underestimate: honest observation and paperwork. The clinician who tests your swallow will spend the first several minutes simply asking questions, and the quality of those answers shapes which tests are chosen and how quickly a plan emerges.

This guide walks through what the evaluation involves, who is usually referred, what the fasting rules actually cover, why your reflux story matters more than you might think, and which reports are worth digging out of the drawer.

Preparing for a dysphagia evaluation: what a swallow test actually involves

Dysphagia is the medical word for difficulty swallowing: food, drink or saliva not moving safely from mouth to stomach. A dysphagia evaluation is the structured way clinicians work out where along that route things go wrong. Most of the time the person running it is a speech-language pathologist (SLP), a clinician trained in the muscles and nerves of speaking and swallowing.

It helps to picture the journey. According to the NIH’s National Institute on Deafness and Other Communication Disorders (NIDCD), swallowing recruits about 50 pairs of muscles and many nerves, working in three stages: the oral stage, where you chew and shape a soft ball of food; the pharyngeal stage, where the throat seals off the airway and pushes that ball downward; and the esophageal stage, where the muscular food pipe carries it to the stomach. A stroke, a nerve disease or a narrowing of the esophagus can each disrupt a different stage, and the tests are chosen to match.

The evaluation itself usually opens with conversation. You will be asked what sticks, where you feel it, whether liquids or solids are worse, whether you cough during meals and how your weight has changed. Then comes an oral-motor exam: the clinician watches your lips, tongue, palate and voice while you speak and move them on request. In a clinical bedside exam, you then swallow small amounts of different textures while the SLP watches and listens for a cough, a wet-sounding voice, repeated throat clearing or food lingering in the cheeks.

What the bedside exam cannot see is the inside of the throat. Aspiration, material slipping into the airway instead of the esophagus, can be silent, with no cough at all. That is why the SLP may recommend an instrumental test, such as an X-ray video of the swallow or a thin camera passed through the nose, to watch the swallow directly (Mayo Clinic).

Who is usually referred for a dysphagia evaluation, and who is asked to wait

Referrals arrive from several directions, and the neurology pathway is the busiest. Swallowing problems are common after a stroke, which is why hospital guidance in many countries calls for a swallow screen by a trained nurse before a person is given anything by mouth; a failed screen leads to the fuller SLP evaluation (NHS). People living with Parkinson’s disease, multiple sclerosis, motor neuron disease, myasthenia gravis or dementia are also referred, sometimes before they have noticed a problem themselves, because these conditions weaken or slow the muscles of the throat over time (NIDCD).

Beyond the brain and nerves, referrals come for food that repeatedly sticks in the chest, unexplained weight loss, recurrent chest infections that could point to silent aspiration, and swallowing changes after treatment for head and neck cancer, where surgery or radiation can stiffen tissues (Mayo Clinic). Older adults whose mealtimes have quietly stretched to an hour, or who now avoid steak and bread without quite knowing why, belong on this list too.

Some people are asked to wait, and waiting is not the same as being dismissed. Someone acutely unwell with pneumonia may have an X-ray swallow study postponed until they can sit upright and stay alert, because the test needs an active participant. A person who is very drowsy after a seizure or new medication is usually re-screened once they are more awake. If you could be pregnant, X-ray-based studies are typically deferred or replaced with a camera-based test while the team weighs the options (MedlinePlus).

Then there is the person who choked once on a rushed sandwich and has been fine since. A single episode with no other change is often managed with watchful observation rather than testing. The decision about who is tested, when, and with which method always rests with the treating team, who can see the whole picture.

Do you have to fast before a swallow test?

The short answer is: it depends on which test is booked, which is why the instructions on your letter outrank anything written here. Swallow testing is not one procedure but a family of them, and their fasting rules differ.

A clinical bedside swallow evaluation usually needs no fasting at all. The SLP wants to see you swallow as you normally do, and arriving hungry and slightly dehydrated does not help. Some services ask you not to eat a large meal in the hour before so that you can manage several trial textures comfortably; others say nothing about it.

X-ray-based studies are different. A barium swallow or esophagram, an X-ray series of the esophagus taken while you drink a chalky contrast liquid, generally requires an empty stomach so the contrast is not mixed with food and the images are clear. Instructions commonly ask you not to eat or drink for a set period beforehand, sometimes from midnight the night before (Johns Hopkins Medicine). A modified barium swallow study, which films the mouth and throat rather than the stomach, sometimes has lighter fasting rules, but many departments apply the same window for simplicity.

A fiberoptic endoscopic evaluation of swallowing (FEES), where a thin flexible camera is passed through the nose to watch the throat, often needs little or no fasting. Upper endoscopy and esophageal manometry, a pressure test of the food pipe, do require fasting because of sedation and accuracy respectively (Mayo Clinic).

Two practical points. If you live with diabetes and are told to fast, ask the booking team how to manage the fasting period; never adjust your own regimen without that conversation. And if the letter is silent on small sips of water, phone and ask rather than guess. A single call beats a test rescheduled at the door.

Barium swallow test preparation: what not to do beforehand

Barium is a heavy, chalky mineral suspension that shows up bright white on X-rays and outlines the lining of the esophagus as it passes through. It is not radioactive and is not absorbed by the body (MedlinePlus). Most of what goes wrong on test day comes from small habits people did not think to mention.

Do not eat or drink past the cut-off in your letter. Food in the stomach can obscure the images and, if the study is extended to the stomach, may make the radiologist repeat views. Chewing gum, sucking mints and smoking are usually on the do-not list too, because they stimulate stomach secretions and swallowed air, both of which muddy the picture (Johns Hopkins Medicine).

Do not decide on your own to skip or take your usual medicines. Some departments want acid-suppressing medicines held on the morning of the test; others want them taken as normal. This is a decision for the prescribing clinician and the imaging team together, and the safe move is to ask when the appointment is confirmed.

Do not wear anything that will need removing in a hurry. Metal zippers, underwire, necklaces and clip-on hearing aids can all cast shadows on the image; a soft top with no fastenings over the chest saves time. Do not hide the possibility of pregnancy, and do not assume the team already knows about previous reactions to contrast agents or difficulty standing for long periods.

One more thing not to do: arrive alone if you are frail, dizzy or newly discharged. The test itself is gentle, but you will be asked to stand or sit very still against a plate while drinking on command, and a companion who can help with coats, forms and the journey home makes the morning far easier. Afterward, barium can leave stools white or pale for a few days and may cause constipation, so the team will usually advise on fluids (Johns Hopkins Medicine).

Why your reflux history matters to the swallow team

Gastroesophageal reflux disease, or GERD, is the repeated backwash of stomach acid into the esophagus. Many people with dysphagia do not connect years of heartburn to the sensation of bread sticking now, but the swallow team makes that connection immediately, and it changes what they look for.

The mechanism is straightforward. Acid that bathes the lower esophagus over long periods can inflame it (esophagitis) and, in some people, leave scar tissue that narrows the pipe: a stricture. A narrowed esophagus lets liquids through but catches solids, which is why a history of pills or meat “hanging up” in the chest points the team toward the esophageal stage rather than the throat (Cleveland Clinic). Reflux that reaches the throat can also irritate the voice box, producing a hoarse voice, throat clearing and a feeling of a lump that has nothing to do with muscle weakness.

This is why reflux history steers the choice of test. Symptoms centered in the chest often lead to an esophagram or upper endoscopy; symptoms centered in the throat, particularly after a neurological diagnosis, lead to a modified barium swallow or FEES (Mayo Clinic). Arriving with a clear reflux story can save a round of the wrong test.

What to write down before you go: roughly when heartburn began; whether it wakes you at night; whether food or sour fluid comes back up; whether solids, liquids or both cause trouble; and whether symptoms changed after starting an acid-suppressing medicine. Proton pump inhibitors and H2 blockers, two classes of acid-reducing medicine, work by lowering acid production in the stomach, and their effect on inflammation builds over days to weeks rather than hours. Note the name on your list and leave decisions about continuing or adjusting them to the prescribing clinician.

The reports to bring when preparing for a dysphagia evaluation

The single most useful thing you can bring is an accurate account of your own swallowing. Next comes the paperwork, and here more is genuinely better, because the SLP or radiologist reads the trend across documents rather than any one page.

Start with the neurology and hospital record. A stroke discharge summary, neurology clinic letters and the report from any brain or neck scan tell the team which nerves and muscles may be affected and what to expect. If you have had a swallow study before, bring that report and, if the department can supply it, the video itself; comparing today’s swallow with last year’s is far more informative than a fresh look in isolation.

• Reports from CT or MRI of the head, neck or chest, and chest X-ray reports from any recent pneumonia.
• Endoscopy or gastroenterology letters, including biopsy results and any record of esophageal dilation, a stretching procedure for narrowings.
• Your current medication list, including over-the-counter antacids and supplements, with names rather than descriptions of the pills.
• Weight records or the number on your home scale over recent months, since unintended loss is a key marker (NHS).
• A short food and symptom diary from the past week: what you ate, what stuck, what made you cough.
• A brief phone video of a mealtime cough or a struggling swallow, recorded with your consent, which can show the clinician something you find hard to describe.

Bring the physical items too. Dentures, glasses and hearing aids are part of the test, not accessories: the team needs to see you chew as you actually chew and hear their instructions clearly. If you drink from a particular cup or use a straw at home, bring it. The swallow being tested should look as much like your kitchen table as a hospital room allows.

How your daily medicines fit into swallow test preparation

Medicines matter to a swallow evaluation in two ways: some influence the swallow itself, and some have timing rules on the day. Neither is a reason to change anything on your own; both are reasons to bring a complete list and ask.

Several classes can affect swallowing through their ordinary mechanisms. Sedatives and some muscle relaxants slow reflexes, including the protective cough. Medicines with anticholinergic effects: a group that blocks a chemical messenger involved in saliva production and is found among some bladder, allergy and mood medicines, dry the mouth, and a dry mouth makes forming and moving a ball of food harder (Cleveland Clinic). Certain tablets can themselves irritate or lodge in the esophagus if taken lying down with too little water. None of this means the medicine is wrong for you; it means the SLP wants to know about it.

Timing is the second issue, and it is especially relevant in the Brain & Nerves clinic. People with Parkinson’s disease often swallow better when their medication is working well than when it is wearing off, so the team may want to know when your last dose was taken relative to the test, or may deliberately schedule the study to reflect your typical mealtime state. Some services ask for acid-suppressing medicines to be held before an esophagram; others do not. The prescribing clinician and the testing team resolve this together, usually when the appointment is confirmed.

Bring the list in writing, with generic names if you can read them from the packaging, plus anything bought without a prescription. Include how you actually take each item: whole, crushed, with yogurt, with a full glass of water. If swallowing tablets has become the hardest part of your day, say so plainly. That detail is a symptom worth recording, and it often shapes the advice you leave with (NHS).

Bedside swallow evaluation vs modified barium swallow study: how the tests compare

People often expect one definitive swallow test and are surprised to be booked for two or three. Each test answers a different question, and the SLP or physician chooses in sequence. The table summarizes what each involves and what it can and cannot show, drawing on descriptions from Mayo Clinic, NIDCD and Johns Hopkins Medicine.

Test	What happens	Best at showing	Usual fasting
Clinical bedside swallow evaluation	SLP watches you swallow trial textures; checks voice, cough, oral movement	Overt signs of trouble; whether an instrumental test is needed	Usually none
Modified barium swallow study (videofluoroscopy)	X-ray video while you swallow barium-coated liquids and foods	Timing of the swallow, airway protection, residue in the throat, silent aspiration	Varies; confirm with the department
FEES	Thin camera through the nose watches the throat before and after swallows	Residue, airway closure, saliva handling; no radiation	Often little or none
Barium swallow / esophagram	X-ray series of the esophagus while drinking contrast	Narrowings, pouches, reflux, structural problems	Empty stomach required
Esophageal manometry	Thin tube measures muscle pressure during swallows	Muscle coordination disorders of the esophagus	Required

A useful way to think about it: the bedside evaluation is the clinician’s eyes and ears at the table, the modified barium swallow and FEES are windows into the throat, and the esophagram and manometry are windows into the food pipe below. Someone whose problem is a slow, weak throat after a stroke may never need an esophagram; someone whose steak sticks mid-chest may never need FEES. The plan is built around your story, which is one more reason to tell it well.

What is the four finger test for dysphagia?

The phrase gets typed into search engines often, and the honest answer is that it is not a test you pass or fail. It describes a hands-on technique some speech-language pathologists use during the bedside exam to feel the swallow from the outside.

Here is what actually happens. The clinician rests four fingertips lightly along the front of your neck: one under the chin on the floor of the mouth, one on the hyoid bone (the small horseshoe-shaped bone above the voice box), and two on the thyroid cartilage, the firm shield at the front of the voice box that forms the Adam’s apple. When you swallow, the tongue base tenses, the hyoid rises and the larynx lifts and tips forward, closing the airway. Through those fingertips an experienced clinician can feel whether that lift happens promptly, how strongly, and whether it happens once or in several hesitant attempts.

What palpation cannot do is see inside. It cannot tell whether material slipped into the airway, how much stayed behind in the throat, or where a narrowing sits. Those answers require imaging or a camera (Mayo Clinic). Palpation is a screening cue, one of several the SLP weighs alongside your voice quality, cough and breathing pattern.

Two cautions follow. First, it is not a home self-diagnosis method. Feeling your own neck while swallowing tells you little without training, and a normal-feeling lift does not rule out silent aspiration. Second, the term is sometimes confused with unrelated finger-width measures used in airway assessment before anesthesia; they are different procedures for different purposes. If your clinician places fingers on your neck during the exam, it is simply one way of gathering information. Ask what they felt. Most are happy to explain, and the explanation is often the moment the mechanics of your own swallow start to make sense.

What causes a person to fail a swallow test?

“Failing” is the word patients use; clinicians tend to say a screen was positive or a study showed aspiration. The distinction matters, because a positive result is a finding to act on rather than a verdict on you.

In a bedside screen, the signs that trigger a positive result are the ones you can observe at a dinner table: coughing or choking during or shortly after a swallow, a wet or gurgly voice afterward, needing several attempts to clear a mouthful, drooling, food remaining in the mouth, a change in breathing, or a drop in oxygen levels on a finger probe (NHS). A swallow that is very slow to start after the clinician sees you close your lips can also be flagged.

In an instrumental study, the criteria are more precise. On a modified barium swallow, the radiologist and SLP look for penetration, where material enters the entrance of the airway but does not pass the vocal folds, and aspiration, where it passes below them. They note whether you sensed it and coughed, and how much residue stayed pooled in the throat after the swallow. On an esophagram, a “positive” result may be a narrowing, a pouch, or barium that takes too long to clear (Johns Hopkins Medicine).

The underlying causes cluster into a few groups. Neurological damage from stroke or progressive nerve disease weakens or slows the muscles and reflexes. Structural problems such as strictures, tumors or a Zenker’s diverticulum, a pouch that forms in the throat wall, physically obstruct or divert food. Medicines that dry the mouth or dull reflexes, a low level of alertness, poor dentition and simple fatigue can all tip a borderline swallow into a positive result on the day (NIDCD).

A positive test usually leads to modified textures, swallowing therapy, further imaging or a referral, chosen by the team. It rarely ends the conversation; more often it starts a useful one.

What the days and weeks after a dysphagia evaluation usually look like

Most people leave the appointment with more clarity than they expected. A bedside evaluation often ends with immediate feedback about which textures looked safest and whether an instrumental test is recommended. Imaging studies may be discussed on the spot by the SLP present, with a formal written report following once a radiologist has reviewed the images; ask before you leave how and when the report will reach you and your referring clinician.

If barium was used, expect pale or white stools for a few days and possibly some constipation, and follow the team’s advice on fluids (Johns Hopkins Medicine). A camera-based FEES can leave the nose mildly tender for a day. Neither should stop you from eating as advised.

The recommendations that follow tend to fall into a few strands (Mayo Clinic; NIDCD):

• Texture and consistency changes, such as softer solids or slightly thickened liquids, framed as a starting point to be reviewed rather than a permanent diet.
• Posture and pacing strategies: sitting fully upright, smaller mouthfuls, a chin-down position, alternating solids and sips.
• Swallowing exercises taught by the SLP to strengthen or coordinate specific muscles, with practice at home between sessions.
• Onward referral to gastroenterology, ENT or neurology when the study points to a narrowing, an airway problem or a progressing nerve condition.

Follow-up timing varies with the cause. After a stroke, swallowing can change quickly in the early weeks, so reassessment is often frequent; in a slowly progressive condition, repeat studies are spaced further apart and triggered by new symptoms. In some people, dysphagia improves substantially; in others, the goal is safe, comfortable eating with a condition that will persist. Your team will tell you which picture fits, and honesty about how the strategies are working at home helps them adjust.

What people often get wrong about swallow testing

The first misconception is that a swallow test is only for people who choke. Silent aspiration, where food or drink enters the airway without triggering a cough, is a recognized reason people with neurological conditions develop repeated chest infections without ever feeling that they swallowed badly (NIDCD). A referral without dramatic symptoms is not an overreaction.

The second is that fasting is universal. It is not. Bedside evaluations rarely require it, some camera-based studies require none, and X-ray studies require an empty stomach. People sometimes arrive at a bedside assessment having skipped breakfast and their morning routine, tired and dry-mouthed, which makes the swallow look worse than it is on an ordinary day. Read the letter for your specific test.

The third is that thickened liquids or soft foods are a life sentence. Texture changes are a safety measure while the underlying problem is treated or while therapy builds strength, and they are reviewed. Some people move back toward normal textures; some do not; the point is that the recommendation is meant to be revisited, not endured in silence (NHS).

The fourth is that the “four finger test” is something you can do at home to check yourself. It is a clinician’s palpation technique, and it cannot see the airway. The fifth is that barium is dangerous or radioactive. It is neither; it is a contrast agent that passes through the gut unabsorbed, though it can cause temporary constipation (MedlinePlus).

The last misconception is quieter and more common: that a mealtime that now takes an hour, or a growing avoidance of steak, apples and dry bread, is just aging. Slower eating and food avoidance are symptoms worth reporting. They are exactly the observations the team hopes you will bring, written down, to the appointment.

Questions to ask your care team

The most productive appointments are the ones where the patient arrives with a short list. You do not need to understand the physiology to ask good questions; you need to know what you want to be able to do at the end of the process, eat with family without fear, take your tablets comfortably, stop the cycle of chest infections. Start there and let the questions follow.

• Which test am I having, and does it require fasting? From what time, and does that include sips of water?
• Should I take my usual morning medicines, including heartburn tablets and any Parkinson’s medicines, before the test? Who decides if the answer is unclear?
• Would it help if I brought the video or report from my previous swallow study, and how do I request it?
• Is this test looking at my throat, my esophagus or both, and why was it chosen for me?
• Will someone explain the findings on the day, or will the report come later, and to whom?
• If textures are changed, how long before that recommendation is reviewed?
• Are there swallowing exercises I should start, and who will teach them?
• What signs at home should prompt me to call before the next appointment?

Write the answers down or ask a companion to. Swallowing is an area where the advice is often practical and specific, and it is easy to lose half of it between the clinic and the parking lot. If a recommendation does not fit your life, you eat most meals alone, you cannot easily thicken drinks at work, say so. Speech-language pathologists adjust strategies to real circumstances all the time, and they can only do that when they know what those circumstances are. Every decision about testing, textures and treatment remains with the team looking after you; your job is to make sure they have the whole picture.

When to call your doctor

Most swallowing problems unfold slowly, and most of the preparation described here can wait for the scheduled appointment. A few situations should not wait, and knowing the difference is part of being ready.

Call emergency services immediately if someone cannot breathe, cannot speak or cough, is clutching their throat, or is turning blue or gray around the lips. That is choking, and it is an emergency in any setting. Seek urgent care the same day if food is completely stuck and you cannot swallow even saliva, if there is severe chest pain during or after eating, or if you vomit blood or notice black stools (Mayo Clinic).

Contact your doctor or the swallowing team promptly, ahead of any booked evaluation, if you notice any of the following (NHS; Cleveland Clinic):

• A fever, new cough with phlegm, or breathlessness after meals, which can signal aspiration pneumonia, a chest infection caused by food or fluid in the lungs.
• Rapid unintended weight loss, or clothes becoming noticeably loose over a few weeks.
• Signs of dehydration such as dark urine, dizziness on standing or confusion, especially if you have been avoiding drinks because they make you cough.
• Swallowing that has suddenly worsened over days rather than months.
• New hoarseness that persists, or pain on swallowing that is getting steadily worse.
• A sudden change in speech, facial droop or weakness on one side alongside new swallowing trouble, which needs emergency assessment for stroke.

None of these signs is a diagnosis, and this is not a checklist for working out what is wrong on your own. They are the moments when the timeline should be shortened and a clinician should take a look. If you are unsure whether something counts, calling is the right choice. The team would rather hear from you early than piece together a missed week from a hospital bed.

Frequently asked questions

How long does a swallow evaluation take?

It depends on the test. A clinical bedside swallow evaluation is typically completed within a single clinic or ward visit, and instrumental studies such as a modified barium swallow or FEES are generally measured in minutes rather than hours, though check-in, positioning and a results discussion add time. Your appointment letter or the booking team will give the estimate for your specific study; allow extra for travel and forms.

What not to do before a barium swallow test?

Do not eat, drink, chew gum, suck mints or smoke past the cut-off time in your instructions, because food, secretions and swallowed air can obscure the X-ray images. Do not change your medicines on your own; ask the prescribing clinician or imaging team. Avoid metal fastenings over the chest, and tell the team if you might be pregnant or have reacted to contrast agents before (Johns Hopkins Medicine).

What is the four finger test for dysphagia?

It is a hands-on technique some speech-language pathologists use during a bedside exam, resting four fingertips along the front of the neck to feel the tongue base, hyoid bone and voice box lift as you swallow. It gives clues about timing and strength but cannot see inside the throat or detect silent aspiration, so it is a screening cue rather than a diagnostic test.

What causes a person to fail a swallow test?

A screen is flagged when the clinician observes coughing, choking, a wet or gurgly voice, repeated attempts to clear a mouthful, drooling or a fall in oxygen levels. On imaging, material entering or passing into the airway or pooling in the throat counts as a positive finding. Underlying causes include stroke or nerve disease weakening the muscles, structural narrowings, drying or sedating medicines, and low alertness on the day (NHS; NIDCD).

Can I take my morning medicines before a swallow test?

Often yes, but not always, and the answer differs between tests and departments. Some services ask for acid-suppressing medicines to be held before an esophagram, and Parkinson’s medicine timing can affect how the swallow performs. Never stop or delay a prescribed medicine on your own; ask the prescribing clinician and the testing team when the appointment is confirmed, and bring a full written list on the day.

What to expect during a swallow test if it is my first one?

Expect conversation first: what sticks, where, and how your weight and meals have changed. The clinician then examines your lips, tongue, palate and voice, and watches you swallow small amounts of different textures. If imaging is booked, you drink or eat barium-coated items while X-ray video records the swallow, or a thin camera is passed through the nose to view the throat. None of it should be painful (Mayo Clinic).

Do I need to fast for a bedside swallow evaluation?

Usually not. The speech-language pathologist wants to see your swallow as it behaves on an ordinary day, and arriving hungry and dry-mouthed can make it look worse than it is. Some services ask you not to eat a large meal in the hour before so you can comfortably manage several trial textures. Always follow the instructions on your own letter, since local practice varies.

What is a modified barium swallow study?

It is an X-ray video of the mouth and throat recorded while you swallow liquids and foods mixed with barium, a contrast material that shows up white on the image. Also called videofluoroscopy, it lets the speech-language pathologist and radiologist see the timing of the swallow, whether the airway closes properly, how much residue stays behind and whether material enters the airway, including silently (Mayo Clinic).

Should I bring someone with me to a dysphagia evaluation?

It is a good idea if you are frail, dizzy, recently discharged or likely to find the instructions hard to remember. A companion can help with coats and forms, observe the meal-time details you may not notice in yourself, and write down the practical advice given at the end. If you have a carer who prepares your food, their presence is especially useful for any texture recommendations.

Is barium safe, and what happens after drinking it?

Barium is a chalky contrast liquid that is not radioactive and is not absorbed by the body; it passes through the gut and out in the stool (MedlinePlus). Afterward, stools may look white or pale for a few days and some people become constipated, so the team usually advises on fluids. Tell them beforehand about any previous reactions to contrast agents, difficulty standing or possible pregnancy.

References

• NIH National Institute on Deafness and Other Communication Disorders: Dysphagia
• NHS: Dysphagia (swallowing problems)
• MedlinePlus: Swallowing Disorders
• Cleveland Clinic: Dysphagia (Difficulty Swallowing)

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.