Coughing during the daytime without coughing and coughing at night as soon as you lie down in bed may be caused by physiological reasons such as smoking, snoring, or gastroesophageal reflux, allergic bronchitis, etc., and can be treated with general therapy, medication and other methods. 1. Physiological reasons: long-term smoking patients are easy to form phlegm stagnation during sleep, which will stimulate the airway to cough at night. Patients with serious snoring will cause a short stop of breathing, which may also lead to nocturnal coughing. Reducing the amount of smoking and adjusting the sleeping position can effectively improve the situation of coughing as soon as you lie down. 2. Gastroesophageal reflux: Gastroesophageal reflux disease (GERD) can be caused when the clearing ability of the esophagus decreases or the mucosal resistance decreases, and the patient is prone to coughing at night while sleeping. Patients can take drugs such as ranitidine, cimetidine and omeprazole for treatment, which can relieve the above situation. 3. Allergic bronchitis: When patients encounter allergens, such as insects and mites, cold air stimulation, etc., dry cough will occur. Patients can take montelukast as well as ebastine and other drugs for treatment. If the patient does not cough during the day and coughs at night as soon as he/she lies down in bed, it may also be caused by other reasons, such as cough variant asthma, gastroesophageal reflux stimulation, cardiac insufficiency, etc. The patient should go to the hospital for treatment in a timely manner. The above medications need to be used under the guidance of a physician.