Arthritic fluid buildup can be treated with compression bandages and oral medications if the amount is small. If the amount of fluid is large, it can be treated by arthrocentesis and knee arthroscopy. Arthritis fluid is clinically common is the knee joint, if the fluid is small, you can use elastic bandage for compression bandage, in order to promote the absorption of fluid. At the same time, we should pay attention to appropriate rest, knee joint hot compresses, massage, baking electricity, promote local blood circulation, promote the absorption of fluid. Oral anti-inflammatory analgesic drugs such as diclofenac sodium, celecoxib and other anti-inflammatory pain. If there is a lot of fluid in the joint, the fluid can be extracted by joint puncture and the joint can be lubricated by injection of sodium vitrate, and compression bandage is also needed after the fluid is extracted. If the fluid buildup is recurrent and cannot be relieved by repeated fluid drawdowns, arthroscopy can also be performed to remove the diseased synovium and relieve the fluid buildup in the knee joint. If the symptoms of arthritic joint effusion occur, it is recommended that the patient go to the hospital to improve the examination, clarify the cause of the disease and receive regular treatment. The above medications should be used in accordance with medical advice.