Myocardial infarction can cause fever. Fever in myocardial infarction patients is mainly caused by the absorption of myocardial necrosis. Usually fever occurs 1-2 days after the chest pain of myocardial infarction, and the degree of fever and the area of myocardial necrosis of myocardial infarction are often positively correlated, and the body temperature usually does not exceed 39 ℃, and most of the body temperature is around 38 ℃. If the temperature of the fever is not high, no special treatment is needed, and physical cooling can be given if necessary. Elevated body temperature due to myocardial necrosis material absorption will not last more than a week. Some patients with myocardial infarction also have infections that cause fever, most commonly respiratory tract infections. The most common is respiratory tract infection, which should be carefully identified, and if the fever is caused by infection, anti-infective drugs should be actively given.