Knee bulge may be osteophytes, joint effusion, bursitis, lipoma, etc., according to the cause of the disease can be taken medication, physical therapy, surgical treatment. 1. Osteomalacia: oral non-steroidal anti-inflammatory drugs such as ibuprofen, if the joint space becomes narrower, joint activity is limited can be arthroscopic cleaning or joint replacement surgery. 2. Joint effusion: joint effusion caused by strain or trauma can be taken to joint pumping pressure bandage, oral Mazolin, ultrasound physiotherapy. 3. Bursitis: local closed injection, ultrasonic physiotherapy can be performed, and bursa resection can be performed if conservative treatment is ineffective. 4. Lipoma: it is a soft mass with clear boundary and no pressure and pain, it can be removed by surgery, and there is no drug treatment for lipoma. Therefore, the joint bulge needs to identify the specific cause of the disease, for the cause of the treatment.