Angina is caused by insufficient relative blood supply to the heart muscle. First, not all patients with angina must have stents. Secondly, the treatment should find the cause of angina pectoris and treat the cause. The common clinical cause of angina is coronary atherosclerotic heart disease, i.e., coronary heart disease, in which case patients are recommended to further improve the imaging examination. 1, must do stent: if patients have luminal stenosis and the stenosis reaches moderately severe, i.e., 75% or more, then stent implantation should be considered to release the stenosis; 2, no need to do stent: if the patient’s stenosis is not serious and does not reach 75%, no stent is needed in this case. In this case, stenting is not necessary, and the standardized application of drugs for coronary artery disease under the guidance of a doctor is sufficient, while bad habits should be improved and angina controlled. If the patient’s coronary artery lesion is more serious and has involved the left main trunk or diffuse lesion of three vessels, this case is not suitable for stenting and may need to be treated by coronary artery bypass surgery. In addition, some other factors causing angina pectoris are also common in clinical practice, such as coronary artery spasm, coronary artery myocardial bridge, aortic stenosis, hypertrophic obstructive cardiomyopathy, etc. These diseases may also induce a relative lack of blood supply to the myocardium, and patients may show symptoms of angina pectoris such as chest tightness and chest pain. For example, in coronary artery spasm, calcium antagonists or nitrates can be given as prescribed by the doctor to improve the symptoms. Patients with aortic stenosis may need to undergo aortic replacement surgery, which will resolve the angina.