If the patient has chest tightness and cold sweat, it is necessary to exclude whether it is an acute myocardial ischemic attack, or it may be a hypoglycemia. When the uncomfortable symptoms occur, it is better to measure the blood sugar first, which is caused by hypoglycemia, you can push concentrated sugar or take oral sugar cubes quietly to help improve, and also to find out whether the patient has poor blood sugar control on weekdays. For acute myocardial ischemia, patients are advised to undergo further coronary CT or coronary angiography. Patients are advised to take sublingual cardiac pills and, in case of high blood pressure, sublingual nitroglycerin for better results. Some patients may be caused by myocarditis or gastrointestinal flu, and can be further examined by chest X-ray, blood count, cardiac enzymes and other tests.