Medically known as idiopathic adhesive capsulitis. There are three key phases of frozen shoulder: the painful phase, freezing phase and thawing phase. The whole syndrome can last up to 18 months and can often alleviate itself. Physiotherapy is useful in assisting in pain relief and maintaining function of the shoulder and arm during and after the above phases. It is also important in getting advice to ensure the neck and upper back do not stiffen.