The feeling of pressure on the chest when lying down after cardiac stenting may be caused by lesions in other branches of the coronary artery, failure to take standardized medication, or mental stress, which may need to be treated by standardized medication or re-surgery. 1. Lesions in other branches of the coronary artery: If the other branches of the coronary artery are narrowed, and the symptoms cannot be relieved with standardized medication according to the doctor’s instruction, stenting may be needed again. 2. Failure to take regular medication: After the operation, you need to take aspirin, clopidogrel and other anti-platelet aggregation drugs to prevent thrombosis; you also need to take nitroglycerin to dilate the coronary artery and relieve the symptoms of chest pain. If you do not take the medication regularly, or reduce the dosage without authorization, it may lead to worsening of the symptoms of chest tightness and chest pain. Aspirin and clopidogrel may have side effects such as bleeding. 3. Some patients may be too worried about complications and become nervous after stent surgery, in which case, patients should try to relax. Lying flat after cardiac stent chest pressure is an abnormal phenomenon, it is recommended to go to the regular hospital in time to find out the cause, and comply with the doctor’s instructions for timely treatment.