The knee joint is the largest weight-bearing joint in the human body, and people have to work, study, and load every day. Synovitis is directly related to the weight-bearing activities of the knee joint, and the correct activities are not only beneficial to the recovery of pain, but also to prevent the recurrence of old diseases. It is important to avoid sports that cause trauma or strain, and to reduce weight-bearing and flexion/extension activities of the knee. In acute inflammatory disease, rest is the main thing, excessive exercise is forbidden, if the amount of fluid is large, rest should be appropriate, elevate the affected limb, do functional exercises of the knee joint in bed, exercise the quadriceps muscle is an important and effective treatment measure, you can lie on your back in bed, after muscle relaxation, self do quadriceps force contraction exercise 30 times, 2-3 times a day, accompanied by straight leg raising exercise 30 times, 2-3 times a day (mild synovitis is generally not necessary) (Mild synovitis generally does not require bed rest and can lead a normal life). After the acute inflammation control edema elimination, you can get out of bed to do single-leg upright endurance test, double palm support on the patella to do around the exercise, sitting on a stool and chair to do kicking exercises, consolidation period with squatting functional exercise (can first support the object or squatting with a healthy limb support), the above methods step by step can not be rushed, gradually increase the amount of exercise. The above methods are not effective to prevent synovitis, but to actively treat other knee conditions to eliminate hidden problems, such as: periarticular ligament injury, patellar chondromalacia, osteoarthritis, etc. These are common causes of this disease, while strengthening the waist and hip, leg muscle training, enhance the stability of the knee joint, avoid sports injuries or trauma, in short, any method to prevent knee osteoarthritis is important to prevent synovitis.