Swelling of the arm from a fall can be due to soft tissue injuries, dislocation of the elbow joint, fracture, etc. Different treatment modalities are used for different causes. Commonly used treatment modalities include general treatment, surgical treatment and so on. 1. Soft tissue injury: after a fall on the arm, the local tissue rupture leads to an increase in the exudation of tiny blood vessels, which will cause swelling of the injured area. Ice can be applied within 72 hours to reduce swelling and relieve pain, and after 72 hours, medicines to activate blood circulation and remove blood stasis such as Panax ginseng ointment can be used as prescribed by the doctor, or hot compresses can be applied to promote blood circulation, which is conducive to the recovery of the affected area. 2. Dislocation of the elbow joint: A fall on the arm may lead to dislocation of the elbow joint, and the joint stabilizing structures such as ligaments will also be damaged, and the elbow joint will bleed and swell. Movement of the injured joint should be avoided, and it should be reset and immobilized by a doctor. 3. Fracture: If a fall on the elbow results in a fracture, the soft tissue around the fracture site is damaged, which can lead to swelling. This kind of patients need X-ray examination to determine the fracture site, and according to the degree of injury, external fixation treatment or incision and reduction surgical treatment, etc.. It is recommended that the patient go to the hospital in time for the doctor to diagnose the cause of arm swelling and treat the symptoms.