Stiff shoulder muscles can be treated by the following methods: First, manipulation and massage treatment. If the patient has muscle strain around the shoulder joint, thus causing stiffness, massage and tui-na treatment can be used. At the same time, together with acupuncture and physiotherapy, the symptoms of stiff shoulder muscles can be improved significantly. Secondly, if the shoulder muscle stiffness is caused by periarthritis, you can use manual release and minimally invasive arthroscopic surgery to restore the range of motion of the shoulder joint and remove the adhesions. This can gradually relieve the stiffness of the shoulder muscles. After manipulation or surgery, the patient should insist on rehabilitation to restore the strength and power of the shoulder muscles. Through the above methods, the symptoms of shoulder muscle stiffness can be significantly relieved or even completely cured, but the patient’s own rehabilitation training is also crucial.