Clavicle pain should be alert to acromioclavicular arthritis, sternocleidomastoid tendonitis, sternoclavicular arthritis, trapezius strain. 1. Acromioclavicular arthritis: it occurs at the lateral end of the clavicle, with localized hyperplasia and bulging, and limited movement of the shoulder joint. 2. Sternocleidomastoid tendonitis: aseptic inflammation of sternocleidomastoid tendon due to trauma or chronic strain injury, pain at the clavicular end of sternocleidomastoid muscle, and obvious pain when turning the neck. 3. Sternoclavicular arthritis: degenerative hyperplasia of the sternoclavicular joint occurs with pain on the medial side of the clavicle. 4. Trapezius muscle strain: the trapezius muscle is attached to the clavicle, if a posture for a long time or often lowered, the trapezius muscle spasm caused by pain. There are many reasons for clavicle pain, such as clavicle tumor can also be caused, need to go to the hospital orthopedic examination, clear cause for further treatment.