Chest pain, to rule out coronary artery disease, is to perform an electrocardiogram, exercise plate test, coronary CT and coronary angiography. Once the symptoms of angina pectoris have occurred, rest should be taken immediately, and at the same time, one tablet of nitroglycerin should be sublingualized. Generally, angina can be relieved within one or two minutes after rest or nitroglycerin implantation, or you can implant or take Chinese herbal medicine compound danshen drip pill and quick-acting heart-saving pill, etc., but the time for relieving angina may take a little longer. If the angina is not relieved after 5 minutes of nitroglycerin insufflation, one more tablet of nitroglycerin can be insufflated. If angina pectoris occurs for the first time, regardless of whether it can be relieved by medication, it is necessary to go to the hospital as soon as possible, because angina pectoris occurs for the first time and there is a risk of myocardial infarction.