1, cardiovascular neuropathy; 2, acute myocardial infarction; 3, angina caused by other diseases: clinically, more than 90% of angina is caused by coronary atherosclerosis, while a few other causes include severe aortic stenosis or insufficiency of closure, rheumatic coronary arteritis and severe anemia, which should be differentiated according to other clinical manifestations; 4, intercostal neuralgia; 5, pleurisy; 6, reflux esophagitis; 7, cholecystitis; 8, cervical heart syndrome; 9, hyperventilation syndrome; 10, herpes zoster, etc.