If there is a similar feeling of chest pressure, chest tightness and dyspnea when lying down, symptoms of heart failure should be suspected in many people. If you lie flat when you have heart failure, the symptoms of pulmonary edema will be aggravated due to blood reflux, and you will experience dyspnea and chest tightness when lying down, while the symptoms improve when sitting up. However, this is not entirely the case, and a similar situation can occur in people with vegetative nerve dysfunction. If the patient has previous heart disease or has bad habits, such as heavy drinking, he or she must go to the hospital to check the indicators of heart failure, such as electrocardiogram, heart ultrasound, etc. As for people who usually do not have heart disease or are in menopause, as well as those who are usually particularly prone to exertion and mental stress, it may be caused by plant nerve dysfunction. If the symptoms are aggravated when lying down and relieved after sitting up, it is necessary to improve the electrocardiogram, cardiac ultrasound and other examinations.