Fever after a fall in the elderly may be caused by inflammation, bone fracture, intracranial injury and so on. 1. Inflammation: If there is a wound after the elderly fall, bacterial dust may enter the wound and cause it to become infected, which will lead to inflammation and cause fever. 2. Fracture: After the elderly fall, it may lead to fracture. Infection of the fracture wound will cause fever, redness, swelling and pain of the wound, and secretion of purulent material. The process of hematoma absorption in the late stage of fracture will produce absorption fever, and fever will also occur. 3. Intracranial injury: If the elderly fall and cause intracranial injury, it may lead to the patient’s thermoregulatory center is damaged, which will cause the elderly fever. At the same time, intracranial injury may lead to intracranial, lung and other parts of the infection, may cause fever. These are only some of the common causes. If an elderly person has a fever after a fall, it is recommended to go to the hospital as soon as possible for diagnosis and treatment under the guidance of a professional doctor.