What Is Dysphagia? Causes and Signs

Dysphagia is the medical word for difficulty swallowing. It means that moving food, drink or saliva from the mouth down to the stomach has become hard, slow or unsafe, because something in that journey is not working as it should. Dysphagia is not an illness in itself — it is a sign that something else is affecting the swallow, and it always deserves proper attention.

The word is sometimes used loosely for any trouble with eating, but its real meaning is narrower: a difficulty with the act of swallowing itself. That might mean food feels stuck, a drink triggers coughing, or a mouthful takes several swallows to clear. For some people the difficulty is mild and occasional; for others it affects every meal.

This guide explains how swallowing normally works, what can cause dysphagia, the signs people notice, and why prompt professional attention matters. It cannot say what is causing one person’s difficulty, or what would help them — only an assessment can do that.

Key Takeaways

Dysphagia means difficulty swallowing: moving food, drink or saliva from the mouth to the stomach has become hard, slow or unsafe.
It is a sign of an underlying cause, not an illness in itself, and it can begin suddenly or develop gradually.
Common signs include coughing at meals, a wet or gurgly voice after swallowing, food feeling stuck, long meals and repeated chest infections.
Food or drink can sometimes enter the airway instead of the stomach — called aspiration — which is why dysphagia needs prompt professional attention.
Only an individual swallowing assessment can show what is happening and what would help. Do not change food textures, thicken drinks or try swallowing exercises on your own.
If someone is choking or having difficulty breathing, call your local emergency number immediately.

What dysphagia means

“Dysphagia” simply describes swallowing that is not working well. It covers a wide range of experiences: swallowing may be painful or effortful, food may feel as though it sticks, drinks may “go down the wrong way”, or the person may avoid eating because swallowing has become tiring or worrying.

Dysphagia is a symptom, not a diagnosis. It tells you that swallowing is difficult, but not why. Finding the reason is part of the professional assessment.
It can affect any part of the swallow. The difficulty might be in the mouth, in the throat, or further down on food’s journey to the stomach — and where the problem sits affects what the signs look like.
It can affect food, drink, saliva, or all three. Some people struggle mainly with drinks, others with dry or solid foods, and some find even swallowing their own saliva difficult.
It can happen at any age. Dysphagia is more often talked about in adults, especially after illness or with ageing, but children can have swallowing difficulties too. This guide focuses mainly on adults; our complete guide to dysphagia and swallowing difficulties gives the wider picture.

An older woman sitting at a dining table at home, enjoying lunch and smiling

How swallowing normally works

Swallowing feels automatic, but it is one of the most carefully coordinated things the body does. Muscles in the lips, tongue, cheeks, jaw, throat and the tube leading to the stomach all have to work in the right order, at exactly the right moment — while breathing pauses briefly and the airway closes for protection. In plain terms, it happens in three stages.

Stage 1: In the mouth

Chewing breaks food down and mixes it with saliva until it forms a soft ball, sometimes called a bolus. The tongue gathers the bolus and moves it towards the back of the mouth, ready to be swallowed.

Stage 2: In the throat

As the bolus reaches the back of the mouth, the swallow is triggered and becomes automatic. In a fraction of a second: the soft palate lifts to close off the nose, the voice box lifts and closes to protect the airway, breathing pauses, and the bolus is squeezed down through the throat. This is the most delicate stage, because the throat is shared by food and air — the timing has to be exact so food passes the airway safely.

Stage 3: Down to the stomach

Finally, the bolus travels down the food pipe (the oesophagus) to the stomach, moved along by waves of muscle squeezing behind it. This stage is automatic too, and we are usually unaware of it unless something feels stuck on the way down.

When every stage works, we swallow hundreds of times a day — food, drink and saliva — without noticing. Dysphagia means something in this sequence has become weaker, slower, less coordinated or less sensitive, so one or more stages no longer work as they should.

A man sitting comfortably at a kitchen table at home, drinking a glass of water

What can cause dysphagia

Because swallowing depends on so many muscles, nerves and structures working together, many different things can disrupt it. The causes below are described in general terms only — an assessment is needed to work out what is behind any one person’s difficulty.

A stroke. A stroke can affect the parts of the brain that control the muscles and timing of swallowing, so dysphagia may appear suddenly, alongside changes to speech or weakness. The World Stroke Organization and the Stroke Association offer general information about stroke and recovery.
Other conditions affecting the brain and nerves. Conditions that gradually affect movement, strength or coordination — such as Parkinson’s disease, motor neurone disease, multiple sclerosis or dementia — can also affect swallowing over time.
Brain injury and illness. A head injury, brain tumour or serious illness can disrupt the control of swallowing, suddenly or during recovery.
Weakness and general frailty. After a long illness, surgery or a stay in hospital, the muscles used in swallowing may simply be weaker until strength returns.
Problems in the mouth or throat themselves. Mouth or throat infections, dental problems, a very dry mouth, or growths or narrowing in the throat or food pipe can all make swallowing difficult. These need medical investigation.
Ageing. Swallowing tends to become slower and a little less strong with age. On its own this is often manageable, but it can leave less reserve when illness strikes.
Certain medicines. Some medicines can contribute to a dry mouth, drowsiness or reduced alertness, which may affect swallowing. If you suspect a medicine is involved, raise it with the doctor who prescribed it — do not stop or change prescribed medicine on your own.

Signs people notice

Dysphagia shows itself in everyday moments, often at mealtimes. Signs that families commonly describe include:

Coughing or choking when eating or drinking, or frequent throat clearing during meals.
A wet, gurgly or croaky voice after swallowing, as though the voice is bubbling through liquid.
Food feeling stuck in the throat or chest, or needing several swallows for one mouthful.
Food collecting in the cheeks or left in the mouth after swallowing.
Food or drink coming back up, or escaping through the nose.
Meals taking much longer than they used to, or eating becoming tiring.
Avoiding certain foods, eating less, or losing weight without meaning to.
Repeated chest infections, which can develop if food or drink regularly enters the airway.
Drooling or difficulty managing saliva.

One sign on its own does not prove dysphagia, and a single cough at one meal happens to everyone — it is the repeated pattern that matters. Our guide to the signs of swallowing difficulties in adults describes each sign in more detail, including the important point that some swallowing problems show few outward signs at all.

A woman sitting at a table at home, eating a bowl of soup comfortably

Why dysphagia needs prompt attention

It is easy to adapt quietly to a difficult swallow — eating less, avoiding favourite foods, skipping meals with friends — without realising that help exists. There are good reasons not to simply live with it.

Aspiration. If the timing or strength of the swallow is off, food, drink or saliva can pass into the airway and towards the lungs instead of down to the stomach. This is called aspiration. Sometimes it triggers coughing, which clears it; sometimes it happens without any cough at all. Material in the lungs can irritate or infect them, which is one reason repeated chest infections can be a sign of unsafe swallowing. This is not meant to frighten — it is simply why professionals take dysphagia seriously, and why guessing at home is not a safe substitute for assessment.

Nutrition and hydration. If eating and drinking become slow, effortful or worrying, it is easy to take in less than the body needs — losing weight, becoming weaker and not drinking enough, which makes recovery from any illness harder.

Enjoyment and social life. Meals are social as well as nutritional. When swallowing becomes difficult, people may withdraw from family meals and eating out, and lose pleasure in food — a valid reason to seek help in itself.

The hopeful side is that swallowing can be properly assessed, and professionals can support safer, more comfortable eating and drinking once they understand exactly how a person’s swallow is working.

What a swallowing assessment involves

If dysphagia is suspected, a doctor can refer the person for a swallowing assessment, usually carried out by a speech and language therapist. In general terms, an assessment involves:

Talking first. The therapist asks about the signs noticed, when they happen, the person’s general health, and what eating and drinking are like now. Notes you have made about mealtimes are genuinely useful here.
Looking at the mouth and movements. The therapist may look at how the lips, tongue and jaw move, and how strong and coordinated they seem.
Watching real eating and drinking. Usually the person is observed eating and drinking familiar things, so the therapist can see how each stage of the swallow is working.
Further checks, if needed. Sometimes the therapist recommends an instrumental check — a test that lets the swallow be seen directly from inside — arranged through the appropriate medical service, so decisions rest on clear evidence.

Afterwards, the therapist explains what they found in plain language and talks through any support they recommend. Our step-by-step guide to what happens in a swallowing assessment describes the process in more detail. General information about swallowing disorders is also available from the American Speech-Language-Hearing Association (ASHA) and the National Institute on Deafness and Other Communication Disorders (NIDCD).

How support is decided

There is no single approach to dysphagia that suits everyone, because no two swallows — and no two difficulties — are alike. Support is decided by the professionals involved, based on the individual’s assessment, their health, and their own wishes. In educational terms, support might involve:

Recommendations about how food and drink are given — for example, the consistency of food or drink, pacing, positioning or supervision at meals, chosen for the individual’s particular pattern of difficulty.
Swallowing exercises or techniques, where the therapist judges they would help. Exercises are taught in person, practised with guidance, and reviewed over time.
Practical strategies for mealtimes, such as smaller mouthfuls or a quieter environment, when the therapist advises them for that person.

Please hold on to one important point: changes to food textures, thickened drinks and swallowing exercises are never things to start at home based on general information, including this article. What is safer for one person’s swallow can be unsafe for another’s, and these decisions carry a real risk of choking or aspiration if they are guessed. They must be individually assessed, taught and supervised by a qualified speech and language therapist. If you are given recommendations, follow those — and if they seem not to be working, go back to the professional rather than adjusting them yourself.

An adult daughter sitting at a dining table talking with her older father over a meal at home

When to seek help

Call your local emergency number immediately if:

The person is choking and cannot clear it — they cannot breathe, speak or cough effectively.
The person has difficulty breathing.
Swallowing problems appear suddenly together with a drooping face, weakness in an arm or leg, or sudden changes to speech. These can be signs of a stroke and need emergency help straight away.

Seek prompt medical advice — from the person’s doctor, without waiting for a routine appointment — if:

There is regular coughing at meals, a wet or gurgly voice after swallowing, or food often feels stuck.
The person has had repeated chest infections, or a chest infection that is not clearing.
Eating and drinking have become much slower, foods are being avoided, or weight is dropping without trying.
The person seems not to be drinking enough, or has stopped eating or drinking.
You are simply worried. You do not need to be certain it is dysphagia before asking — describing the signs and asking for an assessment is reasonable in itself.

Questions to ask a therapist

If you are arranging or attending a swallowing assessment, these questions may help:

What do the signs we have noticed suggest about how swallowing is working?
What will the assessment involve, and will it include eating and drinking real food and drink?
How will you see what happens during the swallow itself, beyond what can be observed at the table?
What should we watch for at home, and which changes should we report straight away?
If you make recommendations, how will they be explained and shared with the family and the doctor?
When will swallowing be reviewed, and what should we do if things change before then?

Frequently asked questions

Is dysphagia a disease?

No. Dysphagia is the word for the difficulty itself — swallowing that has become hard, slow or unsafe. It is a sign that something is affecting the swallow, such as a stroke, another condition affecting the brain or nerves, weakness after illness, or a problem in the mouth, throat or food pipe. An assessment aims to find how the swallow is working and what lies behind the change.

Can dysphagia come on suddenly?

Yes. Dysphagia can appear suddenly, for example after a stroke or head injury, when someone who swallowed normally one day struggles the next. It can also develop gradually over weeks, months or years, for instance with ageing or a long-term condition. Sudden swallowing problems arriving with a drooping face, arm weakness or sudden speech changes are an emergency: call your local emergency number immediately.

Does dysphagia mean food is going into the lungs?

Not necessarily, but it can happen. When swallowing is not working well, food, drink or saliva may enter the airway instead of the food pipe — called aspiration — and some may reach the lungs, which can lead to chest infections. It can also happen without coughing, so it cannot always be spotted at home. An assessment looks at whether aspiration is happening and what would reduce the risk for that individual.

Should we thicken drinks or change food textures at home?

No — please do not change drinks or food textures, or start swallowing exercises, based on general information alone. These changes are sometimes part of professional support, but they are chosen for one person’s particular pattern of difficulty after an individual assessment; what helps one person can be unsafe for another. They must be assessed, taught and supervised by a qualified speech and language therapist. Arrange an assessment, and follow only the recommendations made for the person concerned.

Who assesses dysphagia?

Swallowing is usually assessed by a speech and language therapist, who specialises in communication and swallowing. A doctor may make the referral, consider the wider medical picture, and arrange any further medical checks. Other professionals may be involved too, depending on the cause and the person’s needs.

Can dysphagia get better?

Swallowing can change over time. For some people it improves as they recover from the illness or event that caused it, or as support is put in place; for others the difficulty is longer-term, and support focuses on swallowing as safely and comfortably as possible. What happens varies a great deal, and no outcome can be promised — an assessment gives the clearest picture of what to expect.

A gentle next step

If swallowing has become difficult — for you or for someone you care for — you do not have to work it out alone. Noting the signs, raising them with a doctor and asking about a swallowing assessment are all positive steps. If you would like to talk about swallowing difficulties or what an assessment could involve, you are very welcome to get in touch online. There is no obligation and no pressure: just a friendly first conversation, at your pace.

By Hamayal Adnan, Speech-Language Pathologist

This article is for general educational purposes only and is not medical advice. It does not replace an assessment by a qualified speech and language therapist or other healthcare professional. Every person is different. If you have concerns about speech, language, feeding or swallowing, please seek professional advice. In an emergency, call your local emergency number.

What Is Dysphagia? Causes and Signs Explained

Key Takeaways

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What dysphagia means