What is Causing Your Shoulder Pain
Your shoulder might look like a simple joint from the outside, but inside, there’s a lot going on. Sure, the shoulder joint is the “meeting spot” for three bones — your upper arm (humerus), collarbone (clavicle) and shoulder blade (scapula). But your shoulder also contains muscles, ligaments, tendons, cartilage and nerves, all of which work together to help your shoulder move.