Heart pain suggests the possible presence of circulatory, respiratory, and hematologic disorders. It may also be related to cardiac neurosis caused by lifestyle and stress. 1. Circulatory system diseases: arrhythmia, such as ventricular fibrillation; coronary artery disease; myocardial diseases, such as dilated cardiomyopathy, hypertrophic cardiomyopathy; heart valve disease, such as mitral stenosis; pericardial disease, such as acute pericarditis, these diseases directly or indirectly lead to myocardial ischemia and hypoxia, causing heart pain. 2. Respiratory diseases, such as chronic obstructive pulmonary disease and respiratory failure, can lead to a decrease in arterial blood oxygen levels, resulting in myocardial ischemia and causing heart pain. 3. Diseases of the blood system: anemia, for example, can cause the body to be in a state of hypoxia, leading to myocardial ischemia, thus causing heart pain. 4. Lifestyle: Strenuous exercise will cause peripheral vasodilatation, accelerated heartbeat, and increased oxygen consumption by the heart muscle, leading to myocardial hypoxia and causing heart pain. 5. Cardiac neurosis: excessive life stress can cause cardiac neurosis, patients may experience palpitations (rapid heartbeat, often accompanied by panic), dyspnea, conscious angina and other symptoms. There are many diseases that cause heart pain, it is recommended to go to the hospital in time to find out the cause and follow the doctor’s instructions for timely treatment.