Synovitis is mainly a sterile inflammatory disease, and there are two types of synovitis, specific and non-specific, with synovitis of the knee joint being the most common in the clinic. Synovitis of the knee joint is the most common clinical condition. The main manifestations are redness, swelling and pain in the joint, limitation of movement, and effusion in the joint cavity. MRI examination is convenient and direct, arthroscopy and culture examination of the effusion are of great significance in confirming the diagnosis of this disease. Treatment: 1, general treatment is mainly rest and application of ibuprofen, diclofenac, loxoprofen, glucosamine and other pain relievers. 2, functional exercise of the affected limb is also very necessary. 3, surgical resection can be done if necessary. 4, traditional Chinese medicine includes: local massage, acupuncture, moxibustion, acupuncture and cupping, and topical traditional Chinese medicine is mainly used to activate the blood circulation, remove blood stasis and clear the pain, try moxa leaf 10g sumac 10g extensor 10g saffron 15g tuyuan 10g smoked. 15g Tuyuan 10g fumigation and external washing, or with coarse salt 200g plus pepper with pepper 25g into the cloth bag heated hot compresses on the affected area.