Daytime not so much cough at night has been coughing may be chronic bronchitis, chronic pharyngolaryngitis, pulmonary heart disease caused by. 1. Chronic bronchitis: patients with increased bronchial secretions in the lung organs at night, people in a state of sleep, can not be discharged in a timely manner phlegm, change the sleeping position at night, secretion stimulation of bronchial smooth muscle contraction, resulting in coughing at night. 2. Chronic pharyngolaryngitis: the patient’s pharynx inflammation spasmodic edema, caused by the narrowing of the pharynx, lung secretions increase at night, stimulate the pharynx, resulting in increased cough at night. 3. Pulmonary heart disease: pulmonary heart disease will lead to a decline in the right heart function, sleep at night lying down the heart’s blood return increased, the burden on the heart, thus causing the daytime does not cough at night has been coughing symptoms. The daytime is not so much coughing at night has been coughing may also be caused by other reasons, it is recommended to the hospital to do the examination, clear cause of the symptomatic treatment!