Pharyngitis refers to the chronic inflammation of the mucous membrane and submucosal layer of the pharynx, which can extend to the lymphatic tissue adjacent to the pharynx. Its causes are related to bacterial infections, viral infections, environmental factors, and the dietary habits of the patient. In traditional Chinese medicine, it is considered to be caused by excessive internal heat. Thus, symptoms of pharyngitis can include dry throat, a sensation of heat, a foreign body sensation, discomfort when swallowing, and an irritating cough. In severe cases, it might lead to pain, coughing, and expectoration of phlegm, which are some of the main symptoms of pharyngitis. Severe cases might also involve throat pain and swelling of the submandibular lymph nodes.