A dry and sore throat may be caused by drinking too little water, acute upper respiratory tract infection, reflux esophagitis, dry syndrome, etc., and needs to be treated with medication for the cause. 1. Drinking too little water: the symptoms are caused by dryness of the mucous membrane of the throat when there is a long-term lack of drinking water, in addition to high ambient temperatures and poor air circulation can also be caused. It is necessary to ensure adequate intake of water and avoid prolonged exposure to hot and high temperature environment. 2. Acute upper respiratory tract infection: viruses invade the upper respiratory mucosa causing acute inflammatory reaction of the mucosa of the throat, mucosal congestion and edema, in addition to water evaporation due to elevated body temperature, local dehydration and cause this symptom. You need to rest, drink more hot water, and apply acetaminophen, pseudoephedrine hydrochloride and other medicines under doctor’s guidance for symptomatic treatment if your body temperature is 38.5 or above. 3. Reflux esophagitis: after the lower esophageal sphincter dysfunction, the restriction of gastric acid is weakened, gastric acid, pepsin and other gastric contents reflux, corrosion and irritation of the mucous membrane of the pharynx and the symptom occurs. It is necessary to apply omeprazole, cimetidine, aluminum sulfate, bismuth pectin and other drugs under the guidance of the doctor for anti-gastric acid treatment. 4. Dry syndrome: autoimmune system disease, resulting in saliva, tears and other synthetic secretion is insufficient, the throat lack of glandular fluid protection and the emergence of this symptom. You can apply hydroxychloroquine, methylprednisolone, cyclophosphamide and other drugs under the guidance of the doctor. Dry and sore throat may be related to a variety of factors, it is recommended to consult a doctor for a clear diagnosis.