There are three types of coughing at night. First, cough variant asthma. The cough caused by vagal excitation stimulation after the patient lies down at night can be determined by doing a bronchial excitation test to determine if it is cough variant asthma. For cough variant asthma, drugs can be applied, such as montelukast, compound methocarbamol, and inhalation drugs such as Shinbik. Second, gastroesophageal reflux. After the patient lies down, a small amount of fluid inside the gastroesophagus will reflux, thus stimulating the cough caused by it. If the patient usually has symptoms of acid reflux and heartburn, it is possible that the cough is caused by gastroesophageal reflux, and oral proton pump inhibitors such as pantoprazole and omeprazole can be taken at this time. Third, postnasal drip syndrome. This is a disease of ENT. When the patient lies flat, a small amount of fluid can flow down the nose and into the throat, stimulating the patient to cause coughing, which needs to be treated at ENT.