The shoulder joint is made up of three bones: the clavicle (collarbone), the scapula (shoulder blade), and the humerus (upper arm bone). Injury to these bones and their surrounding ligaments and muscles is most often sustained during sports with repetitive overhead motions such as pitching in baseball or many swimming strokes.
Scapula fractures occur in the shoulder bone and cause severe pain, bruising, and weakness in the shoulder. Scapula fractures are uncommon, making up about 3%-5% of all shoulder fractures.

Anyone can get shoulder impingement but there are certain risk factors that make some people more likely to develop it, including activity level, anatomy, and previous shoulder injuries.

Although people typically recognize a shoulder dislocation right away, getting an accurate diagnosis will require a medical history and physical examination.
Diagnosing frozen shoulder may require a patient interview, physical exam, medical imaging, and lab tests in order to rule out other shoulder conditions.
A person will need to visit a health care provider in order to receive an accurate shoulder impingement diagnosis. Often a doctor will ask for a patient history, complete a physical examination, and order diagnostic imaging.