In frozen shoulder, the shoulder capsule thickens and becomes tight
In many cases, there is less synovial fluid in the joint.The hallmark sign of this condition is being unable to move your shoulder - either on your own or with the help of someone else.
It develops in three stages:
Freezing : In the"freezing" stage, you slowly have more and more pain. As the pain worsens, your shoulder loses range of motion. Freezing typically lasts from 6 weeks to 9 months.
Frozen Painful : symptoms may actually improve during this stage, but the stiffness remains. During the 4 to 6 months of the "frozen" stage, daily activities may be very difficult
Thawing Shoulder : motion slowly improves during the "thawing" stage. Complete return to normal or close to normal strength and motion typically takes from 6 months to 2 years.