The child of Aunt Wang's family in the neighborhood, due to being addicted to online games, stays by the computer to play whenever he has time. Recently, he has developed shoulder pain. Coupled with the recent warm spring weather that is still cold, he didn't pay attention to keeping warm while sleeping at night. When he woke up during the day, he felt stiffness, heaviness, and unbearable pain in his left shoulder, with restricted joint movement. After a hospital check-up, it was determined that he had periarthritis of the shoulder. So, what should be done if one gets periarthritis of the shoulder? Let the expert tell you the solution.