Dry mouth in the morning may be due to rhinitis and sinusitis or physiological factors. 1. Rhinitis: is due to viruses, bacteria and other physical and chemical factors as well as certain systemic diseases caused by inflammation of the mucous membrane of the nasal cavity, manifested by nasal congestion, headache, runny nose, dry mouth and other symptoms, which leads to the mouth for a long time to exhale and inhale the phenomenon of dry mouth, you can use menglustat sodium, budesonide and other drugs for treatment. 2. Sinusitis: it is due to the inflammation of one or more sinuses, manifested as nasal congestion, runny nose, smell disorders, headache or pressure, fever, chills, dry mouth and other symptoms, which leads to the mouth for a long time to exhale and inhale dry mouth phenomenon, you can use amoxicillin clavulanic acid potassium, cephalexin, ephedrine and other drugs for treatment. 3. Dry syndrome: there will be abnormal secretion of salivary glands, resulting in a reduction of saliva, sleep at night can not drink water in time, waking up with a dry mouth serious situation. 4. Physiological factors: is due to too little water, eat too salty food and dry food, strenuous exercise, anxiety and other problems caused by dry mouth, you need to usually do more water. Dry mouth in the morning to determine the cause of the disease, you can generally use drugs for treatment, if the problem is serious need to go to the hospital in a timely manner for medical treatment, follow the doctor’s advice for treatment.