Use causal in a sentence. of a cause or causes. being or involving a cause. relating to cause and effect.
Causes of frozen shoulder. Frozen shoulder occurs when the sleeve that surrounds the shoulder joint, known as the capsule, becomes swollen and thickened. It's unclear why this happens. The shoulder is a ball and socket joint. The end of your upper arm bone (humerus) sits in contact with the socket of your shoulder blade (scapula).
Patients who have frozen shoulder often have pain that increases with shoulder motion. The pain can interfere with daily activity and sleep. The shoulder stiffness affects motion in all directions such as reaching up in the air or trying to place the hand behind the back.