There are many causes of dry throat, common are: chronic pharyngitis, acute upper respiratory tract infection, chronic laryngitis and so on. 1. Chronic pharyngitis: this is a disease that occurs in the pharyngeal mucosa, submucosa and lymphatic tissues, which belongs to the part of chronic inflammation of the upper respiratory tract, and is related to bacterial infections, occupations, allergies, long-term stimulation of harmful substances, gastroesophageal reflux, and recurrent episodes of acute pharyngitis, etc. This disease is often characterized by dry throat, foreign body, sore throat, dry cough, and other main clinical causes. This disease is often characterized by dry pharynx, foreign body, sore throat, dry cough and other main clinical features. 2. Acute upper respiratory tract infection: this disease is a general term for acute inflammation of the nasal cavity, pharynx and larynx, which is mainly caused by viral infection, and some patients may also have bacterial infection. Nasopharyngeal mucosal inflammation is the main feature, dryness of the throat appears in the early stage of the disease, and may be accompanied by itching, burning and other sensations in the throat. 3. Chronic laryngitis: this is a chronic non-specific inflammation of the mucous membrane in the larynx, the disease will lead to discomfort in the larynx, such as tingling, burning, foreign body, dryness and other sensations, but also accompanied by hoarseness, laryngeal secretion increase and other symptoms. The specific cause of dry throat should be diagnosed by a medical professional and treated according to the doctor’s instructions.