The 4 Stages of Frozen Shoulder
A frozen shoulder, also called adhesive capsulitis, is a very common cause of shoulder pain. Frozen shoulder can take a long time to heal, anywhere from six months to 2 years. The four stages of frozen shoulder include pre-freezing, freezing, frozen, and thawing. These terms describe the typical progression of the condition from early symptoms to recovery.
Source: Verywell health