Also called Adhesive Capsulitis, frozen shoulder occurs when the capsule of connective tissue around the shoulder joint thickens and tightens.
This compromises the shoulder by restricting its movement.
Frozen shoulder typically develops slowly, and in three stages. Each stage can last a number of months.
Freezing stage - Any movement of your shoulder causes pain, and your shoulder's range of motion starts to become limited.
Frozen stage - Pain may begin to diminish during this stage. However, your shoulder becomes stiffer, and it becomes more difficult to move.
Thawing stage - The range of motion in your shoulder begins to improve.