Frozen shoulder mainly refers to inflammation around the shoulder joint, i.e. aseptic inflammation of the joint capsule and ligaments. Frozen shoulder can be preliminarily judged by the following aspects: 1. Pain: refers to the pain around the shoulder joint, especially the pain in the front of the shoulder joint, whereas the pain occurs in the outer side of the upper arm in the early stage, close to the pivot point of the deltoid muscle; 2. Restriction of activities: it is impossible to carry out movements such as abduction, external rotation, posterior extension, internal rotation, etc., for example, it is impossible to comb the hair in daily life. As the back of the hand can not touch the chest and back, resulting in female patients with frozen shoulder can not undo their underwear. It is also known as “50 shoulder” because it occurs around 50 years old.