Coughing in the evening may be caused by poor indoor air circulation and dryness of the respiratory tract, as well as by upper respiratory tract infections, bronchial asthma and left heart failure. 1. Upper respiratory tract infection: because of bacterial or viral infection, there may be mucosal edema, increased secretions and other inflammatory reactions, often manifested in the evening cough, may also be accompanied by headache and fever and other symptoms. 2. Bronchial asthma: manifested by recurrent episodes of coughing, wheezing and other symptoms, mostly in the evening, the symptoms of daytime relief or disappear. 3. Left heart failure: the patient may appear pulmonary stasis, in the evening to sleep in the supine position can be caused by increased venous return blood volume, resulting in pulmonary stasis aggravation, cough aggravation. There are many other causes of coughing in the evening, you should go to the respiratory medicine department of the regular hospital in time to clarify the cause of the disease and cooperate with the doctor’s treatment, so as not to delay the condition.