The treatment of synovial osteochondroma of the left knee includes general treatment, physical therapy, medication and surgery. Synovial osteochondroma of the left knee belongs to synovial lesion in the joint, which is benign and can manifest as joint pain, swelling and knee dysfunction, and has a certain tendency of malignant transformation, so it needs to be treated in time. 1. General treatment: Reduce the activities of the knee joint, and if necessary, give braking and traction of the knee joint. 2. Physiotherapy: When there is obvious pain and swelling in the knee joint, local hot compresses, infrared radiation and other physiotherapy can be given to promote local blood circulation, which is conducive to the relief of symptoms. 3. Drug treatment: mainly symptomatic treatment, for the knee pain is obvious can be given to ibuprofen, diclofenac sodium and other non-steroidal anti-inflammatory drugs treatment, can play a role in pain relief. 4. Surgical treatment: arthroscopic removal of the lesion can be given, and when the lesion is serious and the knee joint is seriously damaged, knee replacement can be considered. Suffering from synovial osteochondroma of the knee joint, it is recommended to standardize the treatment, and the drugs need to be used under the guidance of professional physicians.