Some potential causes of throat swelling are complications of gastroesophageal reflux disease, or GERD, according to Nature.com. Anaphylaxis can also cause the throat to swell, sometimes to the point where the patient's life is endangered, says the American Academy of Allergy Asthma & Immunology.
Laryngopharyngeal reflux is related to GERD, and some of the physical signs are swelling in the larynx, the area beneath the patient's epiglottis and the patient's vocal cords, says Nature.com.
Anaphylaxis is a result of a patient being extremely allergic to medicines, insect bites, foods and even latex, says the American Academy of Allergy Asthma & Immunology. Patients may also become hoarse, have trouble swallowing and start to wheeze as their airways close up.