A strong cough at night and a light cough during the day may be caused by certain diseases, such as asthma, left heart failure, etc.
1. Asthma: the important clinical features of asthma are night and early morning attacks or aggravation, attacks with rales, dyspnea, shortness of breath and cough and other symptoms. The main reason is that the vagus nerve is excited at night, causing contraction and spasm of the smooth muscle of the trachea and bronchial tubes, so there will be a cough at night and a strong cough in the daytime with milder symptoms.
2. Left heart failure: left heart failure is easy to cause pulmonary stasis, which leads to alveolar and bronchial mucosal stasis caused by coughing and sputum and other symptoms, due to the rest at night, the amount of return blood increased, will increase the burden on the heart, so patients with left heart failure, the night is prone to paroxysmal dyspnea, coughing at night and other symptoms.
Night cough heavy daytime cough light, can also be seen in bronchitis, pneumonia and other diseases, it is recommended to go to the regular hospital, identify the cause of the disease, timely treatment.