Swallowing Disorders: What Is Dysphagia and How Is It Treated?

Swallowing is something most people do without thinking — hundreds of times a day, automatically and safely. When swallowing becomes difficult, painful, or unsafe, the consequences can be serious: malnutrition, dehydration, choking, and a condition called aspiration pneumonia in which food or liquid enters the airway and causes lung infection.

Dysphagia — the clinical term for difficulty swallowing — is treated by speech-language pathologists, who have specialized training in the anatomy and physiology of swallowing and in the assessment and treatment of swallowing disorders.

How Normal Swallowing Works

Swallowing is a complex process involving more than 30 muscles and multiple cranial nerves working in precise coordination. It occurs in three phases:

Oral phase: Food or liquid is placed in the mouth, chewed if necessary, and gathered into a cohesive ball (called a bolus) that is then propelled to the back of the mouth by the tongue.

Pharyngeal phase: The bolus enters the throat (pharynx) and triggers an automatic swallowing reflex. The airway is protected — the vocal folds close and the epiglottis tips down to cover the airway — as the bolus passes into the esophagus. This phase happens very quickly and is largely automatic.

Esophageal phase: Muscle contractions move the bolus down the esophagus and into the stomach. This phase is not directly managed by a speech-language pathologist but may involve a gastroenterologist.

A problem in any of these phases can cause dysphagia.

Who Gets Dysphagia?

Dysphagia is more common than many people realize. It can affect people of all ages, though it is more prevalent in older adults and those with certain medical conditions.

Common causes include:

Neurological conditions: Stroke, Parkinson's disease, ALS, multiple sclerosis, traumatic brain injury, and dementia can all affect the neurological control of swallowing.

Head and neck cancer: Surgery, radiation, and chemotherapy for head and neck cancers can significantly affect the anatomy and physiology of swallowing.

Structural changes: Strictures, tumors, or anatomical changes in the throat or esophagus can obstruct swallowing.

Aging: The natural changes of aging — reduced muscle strength, slower reflexes, reduced saliva — can contribute to swallowing difficulties in older adults.

Prematurity: Premature infants often have immature or disorganized swallowing and may need feeding and swallowing support.

Signs of Dysphagia

Signs that swallowing may be compromised include:

• Coughing or choking during or after eating or drinking
• A wet or gurgling voice quality during or after eating
• Food or liquid coming back up or out of the nose
• Sensation of food getting stuck in the throat or chest
• Recurrent chest infections or pneumonia (which may be caused by aspiration)
• Pain when swallowing
• Drooling
• Significant weight loss or difficulty maintaining nutrition
• Avoidance of certain food textures or liquids
• Unusually long mealtimes

Aspiration — when food or liquid enters the airway below the vocal folds — is the primary safety concern with dysphagia. Importantly, aspiration can be "silent" — occurring without coughing or obvious signs — making clinical evaluation essential when dysphagia is suspected.

How Dysphagia Is Evaluated

A speech-language pathologist conducts a swallowing evaluation using clinical examination and, often, instrumental assessment.

Clinical swallowing evaluation: The SLP observes the patient eating and drinking a range of consistencies, examining oral motor function, swallowing coordination, and signs of aspiration.

Videofluoroscopic swallowing study (VFSS): Also called a modified barium swallow study, this is an X-ray procedure in which the patient swallows barium-coated food and liquid while a radiologist and SLP observe the swallowing process in real time on video. It directly visualizes what happens during each phase of swallowing.

Fiberoptic endoscopic evaluation of swallowing (FEES): A flexible scope is passed through the nose to the back of the throat, allowing the SLP to directly observe swallowing with a camera.

These instrumental assessments provide detailed information about where the swallowing breakdown is occurring and whether aspiration is happening.

Treatment Approaches

Treatment for dysphagia depends on the underlying cause, the phase affected, and the severity.

Diet modification: Adjusting the texture of food (soft, minced, pureed) and the thickness of liquids (nectar-thick, honey-thick) to a consistency the person can swallow safely is often a component of management.

Swallowing exercises: Strengthening exercises target the muscles involved in swallowing — tongue, lips, jaw, pharyngeal muscles — to improve strength, coordination, and timing.

Postural strategies: Chin tuck, head rotation, and other positioning adjustments can redirect bolus flow and reduce aspiration risk during swallowing.

Thermal and sensory stimulation: Techniques that heighten sensory input to the swallowing system can improve the speed and coordination of the swallowing reflex.

Neuromuscular electrical stimulation (NMES): Electrical stimulation to the muscles of the throat during swallowing is used in some settings, though evidence for its effectiveness continues to be evaluated.

The goal of dysphagia treatment is to restore safe, adequate oral nutrition as fully as possible while protecting airway safety.

When to Seek Help

If you or a family member is experiencing any of the signs listed above, a referral to a speech-language pathologist for a swallowing evaluation is the appropriate next step. Your primary care physician or specialist can provide the referral.

Do not ignore swallowing difficulties. Untreated dysphagia can lead to serious health consequences including malnutrition, dehydration, and aspiration pneumonia — all of which significantly affect health and quality of life.