A sleep throat is very dry, may be sleeping in a dry environment caused by normal physiological phenomena, suffering from rhinitis, pharyngitis and other diseases will also appear such adverse symptoms, the need for timely medical examination. 1. Physiological phenomenon: sleeping environment is dry, this kind of situation will occur, can be improved by increasing the humidity of the air. 2. Rhinitis: rhinitis may also appear a sleep throat is very dry, mainly due to rhinitis can cause breathing problems, so that the throat is dry, the patient usually sleep with the mouth open to breathe, the pharyngeal mucosa is stimulated by such discomfort. 3. pharyngitis: a sleep throat is very dry, may also be suffering from pharyngitis triggered by adverse symptoms, the pharynx is stimulated by inflammation will appear dry, swollen, itchy and other discomforts, sleep can not replenish water in a timely manner, it will make the symptoms more obvious. When this symptom occurs, it is recommended to go to the hospital in time for relevant examination, clear diagnosis, under the guidance of the doctor’s advice, choose the appropriate treatment.