The treatment of knee joint effusion includes etiologic treatment and symptomatic treatment, mainly including general treatment, drug treatment, surgical treatment and other methods. 1. General treatment: Osteoarthritis is also called degenerative arthritis, mainly conservative treatment, including attention to rest, reduce the weight of the knee joint, appropriate physiotherapy and exercise, a small amount of joint effusion can be self-absorbed. 2. Drug treatment: Rheumatoid arthritis can be treated with non-steroidal anti-inflammatory drugs (NSAIDs), anti-rheumatic drugs, immunosuppressants, etc., which can reduce joint inflammation and promote the absorption of joint fluid, and at the same time, can be combined with the use of acupuncture, physiotherapy and other treatments. 3. Surgical treatment: fracture trauma leading to injury to the knee joint, you can actively treat the fracture trauma, according to the condition of the choice of surgical treatment, postoperative anti-infection, after the control of the primary disease, joint effusion can be absorbed. When there is a large amount of joint effusion, seriously affecting the activities, you can perform joint cavity aspiration, if necessary, can be injected into the joint cavity, inhibit the inflammatory response, reduce fluid secretion. It is recommended that patients with knee joint effusion should consult a doctor in time to clarify the cause of the disease, under the guidance of a professional doctor, reasonable and standardized treatment, and symptomatic treatment.