When people are overly sad, the heart will be in a state of stress in order to adapt to the environment and secrete hormones that make the heart beat faster, which causes a series of physiological changes in the body, resulting in a faster heartbeat and constriction of the peripheral small blood vessels. The accelerated heartbeat will cause an increase in myocardial oxygen consumption, and at the same time, the contraction of small peripheral blood vessels will cause insufficient blood supply to the heart, which will easily cause symptoms such as ischemia and hypoxia in the heart muscle, which will cause pain and other symptoms. Some people are suddenly hit by a major mental shock, excessive sadness, and even trigger sudden cardiac death and other diseases, so usually do a good job of personal heart regulation, to avoid excessive sadness or excitement, so as not to affect health.