Stage three
Stage three is the "thawing" phase. During this period, you'll gradually regain some movement in your shoulder. The pain begins to fade, although it may come back occasionally as the stiffness eases.
You may not regain full movement of your shoulder, but you'll be able to carry out many more tasks. Stage three can last from six months to many years.
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