Synovitis is a disease that occurs mainly in the knee joint. The knee joint is the most synovial, the largest joint surface and the most complex structure of the joint, due to the knee synovial membrane is extensive and is located in the more superficial parts of the limb, so suffered injury and infection of the opportunity to be more, knee synovitis is mainly due to knee sprain and a variety of intra-articular injuries, which results in a group of syndromes. It is easy to cause temporary or long-term partial loss of labor, no matter the harm to the patient and to the society is greater. Although there are many effective treatments, many patients still cannot be cured. Especially some of the young and middle-aged patients have to bear many social and family responsibilities, and at the same time, they are suffering from pain for a long time. Most of the knee synovitis, is in a variety of knee injuries and other conditions such as complications, but can also be alone or secondary to osteoarthritis of the knee joint, the latter mostly in the elderly. In young adults, there is a history of acute knee trauma, and after the injury, mild edema, pain, activity limitation and limp begin to occur in the knee joint. Usually 6—8 hours after the injury, synovial reactive effusion occurs, and the knee joint is obviously swollen, warm, and afraid to move. Examination reveals limited knee flexion and extension activities, difficulty in squatting with pain, there may be limited pressure points around the joint, and a positive floating patella test. Chronic injurious synovial membrane, may not have obvious trauma history, the main manifestation of knee joint tenderness and activity limitation, swelling persists, not dare to squat. It is aggravated by increased activity and reduced after rest. Long-term patients, can be found in the knee joint capsule hypertrophy feeling. Synovitis of the knee, in the elderly more secondary to osteoarthritis of the knee, mainly due to cartilage degeneration and osteophytes produced by mechanical biochemical stimulation, secondary to the synovial membrane of the knee joint edema, oozing and effusion. In young adults, it is mostly due to acute trauma and chronic injury. Acute traumatic injuries include knee sprains, meniscus injuries, lateral collateral ligament or cruciate ligament injuries, and intra-articular effusion or sometimes blood accumulation, which manifests as acute traumatic synovitis of the knee. Sometimes it can also be caused by simple knee joint synovial injury, such as trauma is mild, or long-term chronic knee joint strain. Coupled with wind, cold, dampness attack, can make the knee joint gradually appear swelling and dysfunction, then the formation of chronic knee synovitis. Most of the knee synovitis, is in the above various knee injuries and other conditions, but can also be alone or secondary to osteoarthritis of the knee, the latter mostly for the elderly. In young adults with a history of acute knee trauma, mild edema, pain, limited mobility and claudication begin to occur in the knee after the injury. Synovial reactive effusion usually occurs 6-8 hours after the injury, and the knee joint is obviously swollen, warm, and afraid to move. Examination reveals limited knee flexion and extension activities, difficulty in squatting with pain, there may be limited pressure points around the joint, and a positive floating patella test. Chronic injurious synovial membrane, may not have obvious trauma history, the main manifestation of knee joint tenderness and activity limitation, swelling persists, not dare to squat. It is aggravated by increased activity and reduced after rest. In patients with chronic disease, hypertrophy of the knee joint capsule can be detected. For those who have a lot of fluid in the knee joint or those who have repeated fluid accumulation, arthrocentesis can be done, which can reflect the nature of synovitis and its severity. Therefore, joint puncture and synovial fluid examination have important reference value for the diagnosis and differential diagnosis of knee synovitis. General treatment methods: 1, puncture therapy when the joint effusion is more and the tension is big, joint puncture can be carried out, the effusion and blood can be completely pumped out, and sodium hyaluronate can be injected into the joint cavity, which is the main component of synovial fluid.2, medication acute synovial injuries, stasis and stagnation of blood, the treatment is to dissipate the stasis and generate new blood to reduce the swelling, and if there is inflammation, it is necessary to carry out anti-inflammatory treatment at the same time.3, immobilization and rehabilitation training in the early stage, should be bed-ridden, elevate the affected limb, and use elasticity and elasticity. In the early stage, bed rest should be given, the affected limb should be elevated, elastic bandage can be used for pressure bandage, and weight bearing is prohibited. During the treatment period can be used for quadriceps muscle contraction activity exercise, later should strengthen the knee flexion and extension exercise, which has a positive effect on the elimination of joint effusion, to prevent quadriceps atrophy, prevent recurrent episodes of synovitis, and restore the knee extension and flexion function. 4, local closed treatment, physical therapy, synovitis, life conditioning, avoid long-term strenuous exercise for a long time, excessive, strenuous exercise or activity is one of the basic causes of synovial degeneration. One of the basic reasons. Especially for the weight-bearing joints (such as knee joints, hip joints), excessive exercise makes the joint surface increased force, wear and tear. Long-term strenuous exercise can also make the bone and the surrounding soft tissue excessive force and pull, resulting in local soft tissue damage and uneven force on the bone ilium, thus leading to osteophytes. 2, appropriate physical exercise to avoid long-term strenuous exercise, not inactivity, on the contrary, appropriate physical exercise is one of the good ways to prevent osteophytes. Because the nutrition of articular cartilage comes from the joint fluid, and the joint fluid can only rely on the “squeeze” to enter the cartilage, prompting the metabolism of the cartilage. Appropriate exercise, especially joint movement, can increase the pressure in the joint cavity, is conducive to the penetration of the joint fluid to the cartilage, reduce the degenerative changes in the articular cartilage, thus reducing or preventing synovitis, especially the proliferation and degenerative changes in the articular cartilage. 3, timely treatment of joint injuries joint injuries, including soft tissue injuries and bone injuries. Joint osteophytes are often directly related to intra-articular fractures. Due to incomplete fracture repositioning, resulting in uneven articular cartilage surfaces, thus producing traumatic arthritis. For patients with intra-articular fractures, if they can be treated in a timely manner and anatomically repositioned, traumatic arthritis and joint osteophytes can be completely avoided.4. Reduce body weightOverweight is one of the most important reasons for the development of spinal and joint osteophytes. Excessive weight will accelerate the wear and tear of articular cartilage, make the pressure on the articular cartilage surface uneven, and cause synovitis. Synovitis is the synovial membrane is stimulated to produce inflammation, resulting in the formation of fluid secretion dysfunction of a joint lesion, long-term, affecting the normal life of patients, work, bringing a lot of trouble, some patients around for medical treatment, repeated episodes of pain, and even psychological shadow, in the treatment of the three links to pay attention to the timely and definitive diagnosis; timely and effective comprehensive treatment; timely functional exercise, do a good job! Daily health care, and the usual functional exercise, avoid synovitis activities, reduce joint damage, is to avoid synovitis attack key.