Coughing in bed and not during the day may be caused by cough variant asthma, or it may be due to gastroesophageal reflux disease (GERD) or upper airway cough syndrome (UACS). 1. cough variant asthma: it is an airway hyperresponsiveness disease, which is mainly characterized by irritating cough, predominantly at night or worsening of cough symptoms at night. 2. gastroesophageal reflux disease (GERD): due to the dysfunction of the lower esophageal sphincter, gastric contents may reflux into the esophagus, pharynx, and airway at night when lying down, resulting in symptoms such as cough, heartburn, and chest tightness. 3. Upper Airway Cough Syndrome: nasal diseases cause secretions to flow back to the back of the nose and throat, stimulating cough receptors, leading to cough. Generally nasal secretions increase lying down position is easy to induce cough, so to sleep cough. In addition to coughing, coughing up sputum, the patient usually also complains of throat drops flu, frequent throat clearing, throat itching discomfort and other symptoms. Sleeping cough and no cough during the day can also be caused by other diseases. If the symptoms are not relieved or aggravated, it is recommended to consult a doctor, complete the relevant examinations, clarify the cause of the disease, and follow the doctor’s instructions for causative intervention.