Usually, an outside force is acting to suppress the nerve, or cause nerve damage.[1] Most commonly, shoulder dislocation or fractions in the shoulder can cause the palsy.[8] Contact sports such as football and hockey can cause the injury[9] Other cases have been caused by repeated crutch pressure or injuries accidentally caused by health professionals (iatrogenesis).[4] Furthermore, following an anterior shoulder operation; damage to the axillary nerve is possible and has been documented by various surgeons, thus causing axillary nerve palsy.[10] Other possible causes include: deep infection, pressure from a cast or splint, fracture of the humerus, or nerve disorders in which the nerves become inflamed.[2]