What are swallowing disorders (dysphagia)?

Swallowing disorders, medically known as "dysphagia," are a health condition characterized by difficulty moving food or liquids from the mouth to the stomach. This natural process involves complex stages starting in the mouth, then moving through the pharynx and esophagus to the stomach [3]. When a malfunction occurs in any part of this pathway, a person may feel difficulty or pain when swallowing.

The severity of dysphagia can range from mild discomfort to severe difficulty that prevents adequate food and liquid intake, which may negatively affect nutrition and general health. It is important to understand that dysphagia is not a disease in itself, but a symptom of an underlying health problem that requires evaluation and treatment.

Understanding the Normal Swallowing Process

The swallowing process involves a series of coordinated movements of the muscles and nerves in the mouth, throat, and esophagus [3]. When you consume food, your tongue pushes it into the throat. During this, the epiglottis, a small tissue, folds to cover the trachea to prevent food from entering and causing choking, and directs food toward the esophagus [3]. Afterward, the muscles of the esophagus begin to contract and relax in a wave-like movement known as peristalsis to push food and liquids into the stomach [3]. At the end of the esophagus, there is a lower esophageal sphincter that relaxes to allow food to pass into the stomach, then closes to prevent stomach contents from refluxing back into the esophagus [3]. Any disruption in these steps can lead to dysphagia.

Common Causes of Swallowing Disorders

Causes vary significantly and may include structural or functional problems in the upper digestive tract [1]. Common causes include:

• Gastroesophageal Reflux Disease (GERD): Where acidic stomach contents reflux into the esophagus, which may cause inflammation and narrowing of the esophagus [1].
• Hiatal Hernia: A condition where part of the stomach pushes up through the diaphragm into the chest, potentially causing GERD and difficulty swallowing [1].
• Esophageal Strictures: May result from tissue damage due to acid reflux or other conditions, making the passage of food difficult [1].
• Tumors: Whether benign or malignant, tumors in the esophagus or surrounding areas can obstruct the passage of food [1].
• Neurological Problems: Conditions like stroke or neurological diseases can affect the muscles responsible for swallowing.
• Esophagitis: Inflammation of the esophagus can cause pain and difficulty swallowing.

Diagnosing Swallowing Disorders

Doctors may use several diagnostic tests. Notable tests include:

• Barium Swallow: Also known as "esophagram" or "fluoroscopic swallowing study." This test involves drinking a liquid containing barium, a substance that coats internal organs and makes them clearly visible on X-rays [1]. This test allows the doctor to see how food moves through the esophagus and identify any structural or functional problems [1]. The test usually takes 30 to 60 minutes [1].
• Upper GI Endoscopy: The doctor uses a flexible tube equipped with a camera (endoscope) to view the lining of the upper digestive tract (esophagus, stomach, and the first part of the small intestine) [2]. This procedure can detect inflammation, ulcers, tumors, and take tissue samples if necessary [2].

For more information on swallowing disorders, you can visit Swallowing Disorders: Causes, Diagnosis, and Treatment Options for Improving Quality of Life (Arabic).

Treatment Options and Practical Advice

Treatment for swallowing disorders depends on the underlying cause. Treatment may include lifestyle changes, such as modifying the diet to avoid foods that exacerbate symptoms, or eating slowly in small pieces. In some cases, the doctor may prescribe medication to treat underlying conditions such as GERD [1]. In other cases, medical procedures such as endoscopic dilation to widen a narrowed esophagus, or surgical intervention to remove tumors or repair a hernia, may be needed [2].

If you suffer from persistent difficulty swallowing, severe pain, or unexplained weight loss, it is essential to consult a doctor to evaluate your condition and receive appropriate diagnosis and treatment. These symptoms may be an indicator of conditions requiring immediate medical attention. For example, if you experience difficulty breathing or worsening throat pain after undergoing an upper endoscopy, you must seek medical care immediately [2].

Medical references

• Barium Swallow
• Your Digestive System & How it Works
• Upper GI Endoscopy