The first thing to consider is whether or not there is coronary angina, but there may also be other conditions, such as intercostal neuralgia or costochondritis, and whether or not there is shingles, etc. The typical location of coronary angina is slightly to the left of the junction of the middle and upper third of the sternum. The typical location of angina pectoris should be slightly to the left of the middle and upper third of the sternum, and pain in this area is generally considered to be cardiac pain, which is relatively short-lived, usually lasting more than two to three minutes, but not more than 20 minutes to half an hour at most. The nature of the pain is usually vague, chest tightness or squeezing pain, which may be radiating to the left arm, shoulder or neck. At this time, the electrocardiogram may have certain dynamic changes that can be used as a basis for diagnosis, and if necessary, coronary angiography or coronary CTA can be performed to clarify the diagnosis.