Patient: I sprained my arm playing basketball in ’04 and had arthroscopic treatment. However, sometimes there was pain in the joint, and the joint was also painful when it rained on a cloudy day, and also painful with strenuous activities. A small piece of synovial membrane was detached and removed during the arthroscopy. In 2004, he was examined for synovial crepitus syndrome at the Affiliated Hospital of Qingdao Medical College. Good 1.Can it be cured; 2.What should I pay attention to in general. Zhang Yadong, Department of Orthopedics, PLA 304 Hospital: Synovial crepitus is a normal phenomenon that exists in everyone. But some people due to trauma, more sports and other reasons may lead to synovial folds damage, hyperplasia, thickening, hardening, which can cause synovial inflammatory reaction and pain, and some have a popping sound and other symptoms, called synovial fold syndrome. The synovial fold can be cured by removing the hyperplastic synovial fold. In general, attention should be paid to avoiding trauma, controlling the amount of activity, and preparing for exercise.