The arm is dislocated and the hand can still move. The arm is dislocated at the elbow joint, mainly caused by trauma, and the elbow joint will have significant fixed pain and limited movement, but the muscles and tendons of the fingers will not be affected. Therefore, the patient can still perform activities of the fingers, but cannot bear weight, otherwise it will aggravate the painful symptoms of the elbow joint. If the elbow is dislocated, it should be reset in time. If the compression is too long, it will lead to damage to the local blood vessels and nerves of the elbow joint, which will eventually affect the activities of the fingers and produce severe ischemic muscle contracture, leading to necrosis of the finger muscles, tendons and nerves. Therefore, timely resetting and fixation of the elbow after dislocation is essential for the protection of finger function and should not be ignored.