There are several reasons to consider coughing at night: First, laryngitis, especially allergic laryngitis, which occurs at night when the temperature is lower and the air is drier, easily causing discomfort in the throat and coughing. Second, cough variant asthma, mostly seen in the early hours of the morning when coughing occurs, and will be accompanied by throat itching, chest tightness, breathing difficulties. Third, coughing at night with paroxysmal dyspnea as well as chest tightness and palpitations in the elderly should be ruled out for heart failure. Therefore, it is important to pay attention to coughing at night for a longer period of time and go to the hospital to check ECG, chest CT, cardiac ultrasound, BNP or bronchial excitation test, lung function, etc. for further clear diagnosis.