Cardiac pain refers to the subjective feeling of pain in the heart or in the area near the heart, but it is not necessarily caused by heart disease, it may be caused by other diseases of the chest, or systemic diseases, the diseases that cause cardiac pain are as follows:1. Diseases involving the chest wall: for example, acute dermatitis, subcutaneous cellulitis, herpes zoster, intercostal neuritis, costal chondritis, rib fracture, multiple myeloma, acute leukemia, etc.2, Cardiovascular diseases: such as coronary artery disease, hypertrophic cardiomyopathy, aortic stenosis, acute pericarditis, pulmonary infarction, pulmonary hypertension, aortic entrapment, etc.3. Respiratory and pleural diseases: such as pleurisy, pleural tumors, pneumothorax, hemothorax, bronchiolitis, etc.4. Mediastinal diseases: such as mediastinitis, mediastinal emphysema, mediastinal tumors, etc.5. Other related diseases: there are times when esophagitis, esophageal hiatal hernia, Subdiaphragmatic abscess, etc. may also feel heartburn. Therefore, people with symptoms of heart pain should consult the doctor in time, combined with the corresponding auxiliary examination, to determine what causes heart pain.