Knee edema is treated differently depending on the cause of the edema, specifically in the following ways: 1. Edema caused by osteochondritis of the knee. It is common in young patients, after a lot of exercise, the wear and tear of joint cartilage and aseptic inflammation, through rest, oral glucosamine sulfate, nutritional cartilage and other symptomatic treatment, 1-2 weeks can be significantly improved. 2, synovitis. Commonly seen after cold or flu, treatment requires rest, attention to warmth, local heat application to the knee joint to improve blood flow in the knee joint, at the same time, oral meloxicam and other non-steroidal anti-inflammatory drugs symptomatic treatment. If the effect is not obvious, arthroscopic synovectomy can be performed.3. Effusion caused by osteoarthritis of the knee joint. It is common in older patients with more pronounced joint degeneration, narrow joint spaces, and significant joint effusion, and can be treated by puncture and fluid extraction to temporarily improve symptoms, but the final treatment may still require arthroscopic or joint replacement surgery.4. Joint edema due to infection. Treatment requires surgery, placement of a flushing tube for continuous flushing, as well as intravenous anti-inflammatory treatment to completely kill bacteria in order to restore joint edema.