In clinical practice, if a patient has a raised bone on the shoulder, this is not normal. A normal person’s shoulder should have equal width on both sides and no obvious raised bone. If the patient has this condition, and there is local pain and swelling, and local pressure pain with elasticity fixation, the patient has a subluxation or complete dislocation of the acromioclavicular joint, and an x-ray of the shoulder joint can be taken to make a clear diagnosis. Conservative treatment is the first choice. If the patient has a complete dislocation of the acromioclavicular joint, most of the treatments require surgery, which can be done by incision and fixation with a hooked plate. After surgery, the patient should be instructed to take oral blood-boosting medications and to perform early functional exercises to prevent shoulder joint stiffness or local muscle atrophy.