Slight chest pain after stenting can be caused by in-stent rethrombosis and angina. 1. In-stent rethrombosis: It means that a blood clot appears again at the stent site, which is related to many factors, such as insufficient use of anticoagulants or improper choice of stent. If there is re-thrombosis in the stent, you should seek medical treatment in time, and the main treatments include streptokinase thrombolytic therapy or re-implantation of stent. 2. Angina: some patients may have more than one infarction, or stop taking medication too early, bad habits and other reasons lead to angina, we should consult a doctor in time to choose medication or re-surgery, the medication can be nitroglycerin and other timely pain relief. If there is a high incidence of factors, such as smoking, hyperlipidemia, etc., the emergence of chest pain symptoms should be timely medical treatment, drugs need to comply with the doctor’s instructions for rational application.