Post-myocardial infarction syndrome is a complication of myocardial infarction, the incidence is not high, most of them appear within a month time after myocardial infarction, but also within a week, but it is relatively rare. It is usually caused after cardiac injury and has clinical manifestations such as chest pain, fever, malaise, dyspnea, loss of appetite or lower limb edema. Within one week after myocardial infarction discharge, chest pain and low-grade fever should be considered as this disease, which has recurrent episodes. Improving myocardial ischemia as soon as possible can reduce the incidence, and aspirin is given orally at the onset, and you can also take Salvia drops or heart stabilizing granules. If the pain is severe, morphine, a painkiller, can be used. If loss of appetite and edema of the lower extremities occur, it usually develops into right heart failure, and hydrochlorothiazide can be taken to diuretize and reduce swelling, and hospitalization is required if necessary. The disease has more symptoms, heals well, and many can heal on their own.