After more than a year on the stent, the left chest pain may be due to coronary artery stenosis, coronary artery spasm, coronary artery disease and other reasons, the specific treatment needs to be based on the cause of the disease to choose, you can follow the doctor’s instructions to take aspirin, nifedipine and other drugs, if necessary, surgical treatment. 1. Coronary artery stenosis: If coronary artery stenosis causes vague pain in the left chest, you can use aspirin enteric-coated tablets, clopidogrel bisulfate tablets, atenolol tablets and other medications, and if the symptoms are more serious, you can carry out coronary intervention for treatment. 2. Coronary artery spasm: Nifedipine extended-release, Diltiazem hydrochloride extended-release capsules, Nicorandil tablets and other drugs can be used, and coronary artery dilatation and plasty, coronary artery bypass grafting, coronary artery stenting and other methods of treatment. 3. Coronary artery lesions: If the coronary arteries have abnormal lesions that cause vague pain in the left chest, you can use aspirin enteric-coated tablets, atorvastatin calcium tablets and other drugs, and you can also undergo coronary stenting and other ways of treatment. It is recommended to go to the hospital in time for relevant examinations, to clarify the cause of the disease, and to carry out targeted treatment as soon as possible.