Most 2-year-old children with synovitis can recover in about 7-10 days if it is not very serious by cooperating with conservative treatment, while the recovery time for very serious patients is not well estimated and is mainly determined by the severity of synovitis. Patient treatment includes conservative treatment, surgery, etc., as follows: 1. instruct the patient to reduce the amount of exercise, pay attention to the protection of the affected area, must not be cold; 2. local hot compresses, with acupuncture, baking electricity and other physical therapy methods; 3. joint cavity fluid is very large, it is necessary to actively perform joint aspiration, but must pay attention to the aseptic operation; 4. most through the conservative treatment still can not improve, it is necessary to actively carry out Arthroscopic surgery is necessary to clean the synovial membrane.