What is the definition or description of: frozen shoulder?

Frozen shoulder: Severely limited range of motion of the glenohumeral joint. May be caused by injury, tight capsule, or be idiopathic.

Adhesive capsulitis: Frozen shoulder or adhesive capsulitis is a disorder of the shoulder causing pain, stiffness and loss of motion. Injury, inflammation and/or medical disorders, especially diabetes, causes the shoulder joint capsule to contract. This contraction of the joint capsule is initially painful and results in loss of motion. Sometimes injections and therapy can resolve the symptoms, others require surgery.

Loss of motion: Frozen shoulder is a loss of shoulder motion. The most common reason is called idiopathic (i.e. It happens just because). Diabetics also have a higher risk of it. The capsule in the shoulder begins to get tight and can get very thick, which limits motion. There are three stages to it: 1) freezing stage (very painful), 2) frozen stage (decreased pain but no movement), 3) thawing stage.