Fever after cerebral infarction is mostly seen in concurrent infection or damage to the hypothalamic thermoregulatory center. Some patients with cerebral infarction will have fever, which may be due to the patient’s large cerebral infarction, resulting in long-term bedridden unable to eat and exercise normally, and the body’s resistance is easy to decline, which will lead to viruses, bacteria and other pathogenic microorganisms to enter the lungs, which can cause lung infections, urinary tract infections, etc., triggering inflammation and leading to fever. It is also possible that patients with cerebral infarction involve the hypothalamus thermoregulatory center, causing changes in body temperature, causing central fever, and often manifested as high fever. Fever after cerebral infarction may also be caused by other reasons, it is recommended to consult a doctor in time to clarify the cause and actively treat it.