Dry cough at night can not sleep, may be environmental stimulation, respiratory disease, cardiovascular disease, pleural disease. 1. Environmental stimulation: irritating odor in the indoor air at night, or a large temperature difference between day and night, stimulating the respiratory tract, can cause discomfort in the throat, a violent dry cough, affecting the symptoms of sleep. 2. Respiratory diseases: viral infection triggered by colds, bronchopneumonia, acute laryngitis, cough variant asthma and so on. 3. Cardiovascular disease: patients with left heart failure, lying position can cause an increase in intra-pulmonary stasis, cough symptoms. Dry cough at night can not sleep may also be related to other diseases, should actively seek medical attention, under the guidance of the doctor, to clarify the cause of the disease, the cause of treatment.