The causes of dry throat can be seen in chronic pharyngitis, chronic tonsillitis, diabetes, dry syndrome and other diseases. 1. Chronic pharyngitis is a diffuse inflammation of the pharyngeal mucosa, which can cause dry throat, sore throat, itchy throat, foreign body sensation in the pharynx, irritating cough, etc. It needs to be examined by laryngoscopy, and it needs to be treated with medicines that clear the throat and benefit the pharynx. 2. Chronic tonsillitis is a chronic inflammatory disease of the tonsil tissue, which can cause sore throat, pharyngeal foreign body sensation, irritating cough, dry throat, bad breath and other symptoms, need to use antibiotics for anti-inflammatory treatment, and if necessary, need to be surgically removed from the tonsil tissue. 3. Diabetes is a disease triggered by blood sugar metabolism disorder in the body, which will trigger the phenomenon of dry throat, and requires timely fasting blood sugar, glycated hemoglobin examination, and hypoglycemic treatment if necessary. 4. Dry syndrome is a kind of auto chronic inflammatory immune disease, will trigger the whole body most of the skin mucous membrane dry phenomenon, including the production of dry throat symptoms, as soon as possible to clarify the diagnosis, if necessary, the use of glucocorticoid drug treatment. Dry throat may also be other causes, it is recommended that patients seek medical attention as soon as possible to clarify the cause of the disease, follow the doctor’s instructions for treatment.