Usually, the side effects of coronary stenting refer to the after-effects of coronary stenting, but the rate of side effects is relatively low, and stenting is very crucial, so you should not give up the treatment because of the side effects, and you should follow the doctor’s instructions for the specific diagnosis and treatment. Coronary artery disease stenting is a conventional surgical treatment, which may cause stent site restenosis, blood clots, chest tightness and chest pain and other sequelae. 1. Restenosis at the stent site: This may be due to the fact that after implantation of the stent in some patients, the stent will compress the surrounding tissues, resulting in the proliferation of fibrous tissues around the stent site, leading to restenosis at the stent site. Or due to atherosclerosis still continues after implantation of stent, resulting in stent site restenosis. 2. Thrombus: After implantation of stent, the cardiovascular endothelium will proliferate, and the platelets in the blood will gather and clog in the stent site, forming thrombus. 3. Chest tightness and chest pain: it may be due to the implantation of too many stents in the diseased area of the patient, resulting in the contraction of the heart when the blood vessels can not be contracted along with the contraction of the heart, the compliance becomes poor, chest tightness, chest pain and other symptoms. If discomfort occurs after coronary stenting, it is recommended to consult a doctor in time for the next checkup under the doctor’s guidance.