Frozen shoulder is also known as adhesive capsulitis. It is a very painful condition that has no known cause. A person with this condition is unable to move the shoulder. Simple daily activities may become extremely limited and very painful. There are three stages of frozen shoulder which include the painful stage, the adhesive stage and the recovery stage. People with adhesive capsulitis may benefit from physical therapy to help instruct in range of motion, strength and functional exercises to help the individual regain function, mobility and strength.