Adhesive capsulitis, or as it is more commonly referred to, frozen shoulder, is a severe and long-term problem. It affects 3-5% of the general population, women slightly more than men, typically between 40-60 years old, and is 4x more likely in people with diabetes. The cause of primary adhesive capsulitis is unknown, but secondary adhesive capsulitis occurs when there is already known primary injury to the shoulder. However, the recovery process can be faster with physical therapy, and you can return to your previous full function. There are three phases of frozen shoulder: freezing, frozen, and thawing.