Scapular protrusion may be caused by nerve irritation or injury, trauma, and poor posture. 1. Nerve irritation or injury: such as nerve root cervical spondylosis, suprascapular nerve entrapment, brachial plexus injury, etc. caused by scapular protrusion, mainly due to scapular girdle muscle atrophy so that the bone protrusion is obvious. 2. Trauma: such as humerus fracture, clavicle fracture, spinal injury and other traumatic injuries, bone deformity healing caused by scapular protrusion symptoms. 3. Bad posture: if the patient’s upper back muscles are weak, long-term chest hunching and other bad posture, can be caused by the protruding scapula. Scapular protrusion can also be seen in rickets, developmental abnormalities and other causes, it is recommended to go to the hospital in a timely manner, clear the cause of the cause of treatment in accordance with the doctor’s instructions, to avoid delaying the condition.