The arm pain after a fall may be caused by local soft tissue contusion, bone fracture, fracture and so on caused by trauma. It is recommended that the patient go to the hospital in time to improve the relevant examination, clarify the cause of the disease, and treat the cause. 1. Soft tissue contusion: arm trauma, resulting in local soft tissue contusion, causing arm pain. Patients will have capillary rupture, inflammatory reaction, the affected local skin may appear subcutaneous bruising, swelling and so on. 2. Bone fracture: the arm is traumatized resulting in cracks in the bone tissue but not broken. Patients often show pain, redness, swelling, and limited movement at the lesion, which can be treated with immobilization. 3. Fracture: Trauma causes interruption of bone integrity or loss of continuity, i.e. fracture. Patients may show symptoms such as bleeding, pain, swelling, and limitation of movement in the affected area. It is necessary to carry out manipulation and fixation in time to avoid leaving sequelae. The arm pain after a fall suggests that the patient can go to the hospital in time, complete the relevant examination, clarify the cause of the disease, and treat the cause of the disease under the advice of the doctor.