The wrist and elbow are still sore and swollen 4 months after the fracture of the distal end of the left radius. Possible causes include muscle atrophy, fracture not yet healed, soft tissue injury and so on. 1. Muscle atrophy: As the upper limb needs to be immobilized for a long time after distal radius fracture, so that the fracture can recover. If there is no timely and sufficient exercise at this time, it may lead to muscle atrophy of the upper limb, causing symptoms such as soreness and weakness of the upper limb. 2. Fracture has not healed: if the injury is heavy, damage to the blood vessels, causing poor blood circulation or a combination of diabetes, renal failure and other underlying diseases, the fracture healing is slow, and there will be soreness and swelling of the upper limbs. 3. Soft tissue injury: because the distal radius fracture is often combined with the surrounding muscles, tendons and other soft tissue injuries, the recovery requires a certain amount of time, if the injury has not yet fully recovered, there will also be soreness and swelling. Soreness and swelling of the wrist and elbow after 4 months of distal radius fracture, it is recommended to consult the doctor in time, complete the relevant examinations, clarify the cause of the disease, and follow the doctor’s instructions to avoid delaying the condition.