Why is it normal to have short weather during the day and at night?

Overworked body, coronary heart disease.

1. Overwork of the body: Overwork of the body will cause the body to lose energy, affect the body's metabolism and blood circulation, and lead to shortness of breath during the day. After adequate rest at night, the chest tightness and shortness of breath improved.

2. Coronary heart disease: Coronary heart disease is caused by local obstruction of blood circulation, which can lead to chest tightness and shortness of breath during the day. Symptoms will improve after adequate rest at night.