A swallowing disorder, known medically as dysphagia, is any condition that makes it difficult or impossible to move food and liquid from your mouth to your stomach. It affects an estimated 4 to 10% of adults in the United States, with roughly 10% of people over 65 reporting difficulty swallowing. Dysphagia isn’t a disease on its own but rather a symptom of an underlying problem, whether neurological, structural, or muscular.
How Normal Swallowing Works
Swallowing seems simple, but it actually involves a precisely coordinated chain of events across more than 30 muscles and multiple nerves. The process breaks down into four stages. In the first (oral preparatory), your tongue and jaw work together to chew food and form it into a soft, compact ball. Your soft palate seals against the back of your tongue to keep food from slipping into your throat too early.
In the second stage (oral propulsive), your tongue tip presses up against the roof of your mouth just behind your front teeth. The tongue then rolls upward from front to back like a wave, squeezing the food backward into your throat. From there, the pharyngeal stage kicks in: your airway closes off, your voice box lifts, and a series of muscle contractions pushes food past your throat and into the top of your esophagus. Finally, rhythmic muscle contractions in the esophagus carry the food down into your stomach. A problem at any of these stages can cause dysphagia.
Two Main Types of Dysphagia
Swallowing disorders are classified by where the problem occurs.
Oropharyngeal dysphagia involves the mouth and throat. It means the muscles or nerves responsible for forming food into a ball and pushing it safely past your airway aren’t working properly. The main dangers are food or liquid entering the airway (aspiration) and food getting left behind in the throat after you swallow. You might notice coughing or choking during meals, food coming back up through your nose, a wet or gurgly voice after eating, or the need to swallow multiple times to clear a single bite.
Esophageal dysphagia involves the tube connecting your throat to your stomach. It typically feels like food is getting stuck behind your breastbone. This can result from physical narrowing of the esophagus, problems with the muscles that push food downward, or damage to the valve at the bottom of the esophagus. People with esophageal dysphagia often have trouble with specific textures, particularly solid foods and dry items like bread or meat.
Common Causes
Stroke is the single most common neurological cause of swallowing disorders. The brain damage disrupts the signals that coordinate the dozens of muscles involved in swallowing. About half of people with Parkinson’s disease develop dysphagia at some point, and in motor neuron diseases like ALS, swallowing problems eventually affect nearly everyone as the condition progresses. Other neurological causes include multiple sclerosis, muscular dystrophy, dementia, and Huntington’s disease.
Structural and mechanical causes affect the esophagus more often. Acid reflux (GERD) can scar and narrow the lower esophagus over time. Achalasia, a condition where damaged nerves prevent the esophagus from squeezing food into the stomach, is another well-known cause. Eosinophilic esophagitis, an allergic inflammatory condition, can also narrow the esophagus. Head and neck cancers, whether before or after treatment, frequently cause swallowing problems as well.
Aging itself plays a role. Muscles weaken, saliva production drops, and the swallowing reflex slows. Data from the 2022 National Health Interview Survey found that 6.5% of the general population reported difficulty swallowing, but among Medicare beneficiaries 65 and older, that number rose to 10.1%.
Swallowing Disorders in Children
Children aren’t simply small adults when it comes to swallowing. A child’s mouth and throat anatomy change significantly from birth through puberty, and the adult swallowing pattern doesn’t fully develop until the teenage years. In newborns, swallowing problems often show up as weak sucking during breastfeeding or bottle feeding. Between 6 and 12 months, as infants begin eating pureed and solid foods, problems with chewing and managing different textures may become apparent.
The causes differ from adults, too. Children with cerebral palsy tend to have the most trouble with thin liquids, which move too quickly for their impaired coordination and can enter the airway. Children with neuromuscular diseases, by contrast, often lack the muscle strength to chew and swallow solid food. Polyhydramnios (excess amniotic fluid during pregnancy) can sometimes be an early clue, since it may indicate the fetus isn’t swallowing normally.
Health Risks of Untreated Dysphagia
The consequences of an unmanaged swallowing disorder go well beyond discomfort at meals. The three major risks are aspiration pneumonia, malnutrition, and dehydration. Aspiration pneumonia happens when food or liquid repeatedly enters the lungs, triggering infection. It’s a leading cause of death in people with neurological swallowing disorders.
Malnutrition develops more gradually. When swallowing is painful or exhausting, people eat less, avoid certain foods, and lose weight. A large study of older outpatients found that nearly 38% of those at risk of dysphagia were malnourished, and swallowing difficulty was strongly linked to both poor nutritional status and reduced physical function, including weaker grip strength and lower physical performance scores. This creates a cycle: poor nutrition leads to muscle loss, which makes swallowing even harder.
How Swallowing Disorders Are Diagnosed
Two specialized tests are the standard for evaluating dysphagia, and both are typically performed by a speech-language pathologist.
A modified barium swallow study (MBS) is a video X-ray. You sit in front of an X-ray camera and eat and drink foods mixed with barium, a chalky contrast material that makes the food visible on screen. The clinician watches in real time to see where food travels, whether it enters the airway, and where it gets stuck.
A fiberoptic endoscopic evaluation of swallowing (FEES) uses a thin, flexible camera inserted through the nose into the throat. You then eat and drink foods dyed green so the clinician can directly observe how your throat muscles handle different textures. FEES is portable, which makes it useful for patients who can’t easily travel to a radiology suite, such as those in intensive care or nursing facilities.
Treatment and Rehabilitation
Treatment depends on the type, severity, and underlying cause. For many people, the first step is modifying food and liquid textures. The International Dysphagia Diet Standardization Initiative (IDDSI) provides a standardized framework with eight levels, from thin liquids (Level 0) to regular solid foods (Level 7). Your care team might recommend thickened liquids to slow them down and reduce aspiration risk, or pureed foods that require less chewing and are easier to control in the mouth.
Swallowing therapy exercises form the rehabilitative backbone for oropharyngeal dysphagia. These aren’t generic throat exercises. They target specific parts of the swallowing mechanism. The Shaker exercise, for example, involves lying flat and lifting only your head to look at your toes, which strengthens the muscles that lift the voice box during swallowing. The Mendelsohn maneuver trains you to deliberately hold your voice box in a raised position during a swallow, keeping the upper esophageal sphincter open longer so food can pass through more completely. Effortful swallows and tongue-hold swallows help strengthen the muscles that squeeze food through the throat, reducing the amount left behind after each swallow.
For esophageal dysphagia, treatment targets the underlying structural or motility problem. This might involve stretching a narrowed esophagus, managing acid reflux to prevent further scarring, or treating inflammatory conditions. Achalasia is often treated with procedures that relax or cut the tight muscle at the bottom of the esophagus.
In severe cases where oral feeding isn’t safe, nutrition may need to be delivered through a tube placed directly into the stomach. This is sometimes temporary, allowing time for rehabilitation, and sometimes long-term for progressive conditions where swallowing function continues to decline.