Frozen shoulder is characterized by a pain and stiff shoulder which becomes very hard to move. The development of this condition happens in stages. Stage one is the “freezing” of the shoulder. In this stage pain slowly increases and the shoulder losses range of motion. Stage two is the “frozen” shoulder. In this stage pain decreases but stiffness remains. The third stage is the “thawing” of the shoulder. In this stage motion slowly returns to normal. The source of this condition is unknown and treatment typically includes controlling of pain and physical therapy during symptoms.