Rotator cuff injuries in middle-aged and elderly people are often caused by chronic strain, degenerative changes in the rotator cuff and brittle texture, and therefore usually occur in the habitual shoulder. Symptoms: recurrent or persistent shoulder pain; increased pain at night, especially inability to sleep to the affected side; decreased muscle strength, especially when trying to lift the upper arm; limited joint mobility. Frozen shoulder is a group of diseases that occur in different anatomical sites and have various pathological features, including: calcific tendonitis, adhesive subacromial bursitis, biceps tendonitis, supraspinatus tendonitis, impingement syndrome, rotator cuff injury tears, etc. The current literature on periarthritis often refers specifically to adhesive capsulitis, which has an unknown etiology and is characterized by pain and limited shoulder movement, hence the term “frozen shoulder”. Treatment of rotator cuff injuries requires the patient to keep the shoulder at absolute rest, not to move it, and to take care of it to restore the degree of muscle damage. The treatment of frozen shoulder is the opposite, as it requires activities to strengthen the shoulder joint to accelerate blood supply and improve the inflammatory symptoms.