Toothache can be one of the atypical symptoms of myocardial infarction, mostly on the left side of the toothache, but some of them can be on the right side of the toothache. Myocardial infarction is due to coronary artery blockage and cause myocardial ischemic necrosis of a critical condition, mainly manifested as weakness, precordial pain, chest tightness, palpitations, shortness of breath, cold limbs, etc., toothache, although less frequent, but also may be due to the precordial pain radiating to the gums and then gum pain, due to the left side of the heart, so most of the left side of the toothache, but some of them also may be manifested as the right side of the toothache. Myocardial infarction is an acute and critical disease, which requires timely consultation in the hospital, timely anticoagulation, thrombolysis, pain relief and other treatments, such as aspirin, clopidogrel and other anticoagulant drugs, urokinase, alteplase and other thrombolytic drugs, dulcolax, morphine and other pain medications, as well as percutaneous coronary intervention and other surgical treatments. All of the above drugs should be used under the guidance of professional doctors.