The causes of easy thirst at night include environmental factors and physical factors. Environmental factors may be the high temperature in the room or long time to turn on the heating causing rapid water loss in the body, in the middle of the night will feel thirsty. Most of the physical factors are diseases, mainly including diabetes, nasal diseases, urolithiasis and psychogenic excessive drinking: 1, diabetes: usually more common is diabetes, increased blood sugar patients are prone to dry mouth, thirsty symptoms, and the night is no exception; 2, nasal diseases: some people will be thirsty at night, may be due to nasal development problems or suffer from nasal diseases, such as nasal polyps or nasal septum hypertrophy. This will lead to the patient can not use the nose to breathe normally, can only breathe with the mouth when sleeping, open wide mouth breathing will lead to dry mouth, in the middle of the night easily feel thirsty; 3, urolithiasis: one of the typical symptoms of urolithiasis is thirst, it is recommended to go to the hospital for examination, after diagnosis and follow the doctor’s advice for treatment; 4, psychogenic drinking: these patients do not have physical disease, but will be dry mouth, want to drink water. And if the reason is because of busy work or no water around, patients may ignore this feeling and do not drink. At night when it is quiet and there is nothing to do, the patient is more focused and the symptoms will be especially obvious at night. In this case, patients are advised to seek help from a psychiatrist. If it is clear that the nighttime thirst is not caused by environmental factors, patients are advised to promptly visit a hospital for examination and diagnosis and treatment by a doctor.