Frozen shoulder playing closed, may be due to the treatment of irregularities in the emergence of harm, including the adverse reaction of drugs, injection site infection, tendon damage, etc. Clinical doctors will be combined with the specific circumstances, a reasonable choice of treatment options, try to avoid harm to the body. 1. Adverse reaction of drugs: Closure therapy is to reduce inflammation and inhibit pain by injecting glucocorticoids and local anesthetics, such as prednisolone acetate and lidocaine injection, into the lesion area. Long-term use of glucocorticoids may cause disorders of water, salt, sugar, protein and fat metabolism. Lidocaine may also cause dizziness, drowsiness and other central nervous system symptoms and skin tissue damage. 2. Injection site infection: For people with diabetes, acquired immunodeficiency syndrome and other diseases, if the sterilization and care are not proper, it may cause infection of the needle eye in the injection area. 3. Tendon injury: for tendon injection, if the drug dose is too large, the brittleness of the tendon increases, which may trigger tendon rupture and other injuries. In addition to closed therapy, physical therapy can be considered for frozen shoulder, such as the use of ultrashort wave, intermediate frequency electricity, etc., to promote inflammation; oral anti-inflammatory and analgesic drugs, such as ibuprofen, meloxicam, etc., to reduce inflammation; surgical treatments, such as arthroscopic adhesion release surgery, to improve the function of the shoulder joint and so on. Suffering from frozen shoulder should go to the regular hospital in time, follow the doctor’s instructions for standardized treatment, not private treatment, so as not to cause adverse consequences.