Shoulder fractures most often involve the clavicle (collarbone), proximal humerus (top of the upper arm bone), or the scapula (shoulder blade). Shoulder dislocations can involve any of the three different joints that make up the shoulder.| orthoinfo.aaos.org
In a shoulder dislocation, the head of the upper arm bone (humerus) may come either partially or completely out of the socket. To treat a dislocation, your doctor will place the ball of your upper arm bone back into the shoulder socket, a procedure called a "reduction."| orthoinfo.aaos.org
Shoulder instability occurs when the head of the upper arm bone is forced out of the shoulder socket. Once a shoulder has dislocated, it is vulnerable to repeat episodes. When the shoulder slips out of place repeatedly, it is called chronic shoulder instability.| orthoinfo.aaos.org
Your biceps tendons attach the biceps muscle to bones in your shoulder and in your elbow. If you tear your biceps tendon at the shoulder, you may lose some strength in your arm and have pain when you forcefully turn your arm from palm down to palm up.| orthoinfo.aaos.org
Biceps tendinitis is an inflammation or irritation of the upper biceps tendon—the strong, cord-like structure that connects the biceps muscle to the bones in the shoulder. Symptoms typically include pain and weakness in the front of the shoulder.| orthoinfo.aaos.org
Simply defined, arthritis is inflammation of a joint. In an arthritic shoulder, inflammation causes pain and stiffness. This article looks at the five different types of arthritis that typically affect the shoulder and describes their treatment options.| orthoinfo.aaos.org
Your arm is kept in your shoulder socket by your rotator cuff. The rotator cuff is a group of four muscles that come together as tendons to form a covering around the shoulder. When one of these tendons is torn, it may be painful to lift or rotate your arm.| orthoinfo.aaos.org