Angina pectoris is a common symptom of coronary heart disease, mostly seen in middle-aged and elderly people over 40 years old, more men than women. It is a distress signal issued by myocardial ischemia and hypoxia. Frequent attacks should be alerted to myocardial infarction. Angina pectoris often occurs during exertion, full meal, cold and emotional excitement, with a sudden, less clear range of dull, crushing or tightening pain behind the sternum, radiating to the right shoulder, middle finger, ring finger and little finger. The patient feels panicky and suffocated, sometimes with a feeling of near death. Each attack lasts 1 to 5 minutes and rarely exceeds 15 minutes. Atypical angina presents in a variety of ways, sometimes with only epigastric pain, toothache or neck pain. 1. Immediately ask the patient to stop all activities, sit down or rest in bed. Take nitroglycerin tablets, which can stop the pain in 1 to 2 minutes and last for half an hour; or take 1 to 2 tablets of cardiac pain, which can work in 5 minutes and last for 2 hours, or put isoamyl nitrite in a handkerchief and crush and sniff it, which can work in 10 to 15 seconds. However, there are side effects of head swelling, headache, redness and fever, and it is contraindicated for patients with hypertensive heart disease. 2, if there is no antidote at the time, you can also finger pinch Nei Guan point (2 inches above the transverse stripe on the palm side of the forearm, between the two tendons) or pressure on the sore part of the arm, can also play a first-aid role. 3.Rest for a few moments and send to hospital for examination after the pain is relieved.