If symptoms such as chest pain, chest tightness and sweating occur 3 months after cardiac stenting, you should take nitroglycerin tablets or quick-acting heart-saving pills immediately and go to the hospital at the same time. When symptoms of myocardial infarction such as chest pain, chest tightness, dry mouth, profuse sweating occur after cardiac stenting, the possibility of myocardial infarction is highly suspected. Myocardial infarction after cardiac stent implantation is a common cardiovascular adverse event, which can be triggered by smoking, exposure to cold, and physical activity, etc. The frequency of its onset is also related to the degree of stenosis of the cardiac blood vessels of the patients, their living habits, and other underlying diseases such as diabetes mellitus and high blood pressure. If the above symptoms occur, patients should immediately take oral medications to relieve acute myocardial ischemia, such as nitroglycerin tablets and fast-acting heart pills, and go to the hospital as soon as possible for electrocardiograms and other tests to further define the cause of the disease. After cardiac stenting, you should follow the doctor’s instructions and consult the doctor if you have any discomfort, so as not to take it lightly, which may lead to serious consequences.