There are various reasons for coughing before bedtime, such as cough variant asthma, gastroesophageal reflux disease, cardiac insufficiency and so on. 1. Cough variant asthma: it is a special type of asthma, which is a chronic disease with chronic irritating cough as the main symptom, not accompanied by wheezing symptoms, and it can cause severe coughing before bedtime. 2. Gastroesophageal Reflux Disease (GERD): a clinical syndrome characterized by coughing due to the reflux of stomach acid and other gastric contents into the esophagus. When you sleep lying down, the acidic reflux material may reflux into the pharynx and irritate the throat and trachea, which may cause cough and pharyngeal discomfort and other symptoms. 3. cardiac insufficiency: some patients with chronic cardiac insufficiency, in the lying state, venous return increased, will aggravate the situation of pulmonary stasis, sleep lying down will appear coughing, accompanied by dyspnea, coughing pink foamy sputum, need to consult a doctor in time. There are many other reasons for the emergence of violent cough at bedtime, it is recommended to go to the hospital in a timely manner, to clarify the cause of the disease, under the guidance of the doctor for treatment.