Heart pain is known as precordial pain in medical terminology and has more causes, which may include heart disease, esophageal disease, pulmonary disease and psychosomatic factors, etc. What exactly is going on should be judged by the accompanying symptoms and past medical history. The diseases that may be associated with heart pain are as follows: 1. Cardiovascular system diseases: coronary heart disease (angina pectoris, heart attack, etc.) can cause myocardial ischemia and hypoxia, causing heart pain. Infectious diseases such as myocarditis and pericarditis may also cause heartache. Coronary heart disease is associated with exertion and emotional stress. In case of angina, rest or nitroglycerin inhalation can relieve it. Viral myocarditis may have a history of upper respiratory tract infection before the onset of the disease. Heart pain in pericarditis is related to breathing or body position. Cardiac enzymes, troponin, electrocardiogram, echocardiogram, coronary CT, cardiac MRI or coronary angiogram may be used to clearly exclude heart disease problems. 2, digestive system diseases: gastroesophageal reflux disease, peptic ulcer and biliary tract diseases may cause heart pain. Diseases of the digestive system are affected by eating and antacid therapy, etc. They can be clarified by gastrointestinal endoscopy or ultrasound and other examinations. 3, respiratory system diseases: bronchitis, bronchopulmonary cancer, tuberculous pleurisy, pulmonary artery embolism, pneumothorax may cause pain in the precordial region. The degree of pain varies with breathing and coughing. Pulmonary artery embolism may be accompanied by hemoptysis and dyspnea and other symptoms. 4.Psychological factors: cardiac neurosis and psychological factors. Cardiac neurosis and psychological factors can be considered under the circumstance that no clear cause can be found after careful examination. Heart pain must first be excluded from cardiovascular system diseases, because heart attack may lead to death if not treated in time. In either case, the patient needs to be seen in the hospital as soon as possible to rule out critical illness.