Post-operative knee edema after lumbar disc herniation may be caused by long bed-ridden joint edema or osteoarthritis of the knee joint itself, and the treatment mainly includes physical therapy and medication. 1. Physiotherapy: If the edema is caused by long bed-ridden time, it is suggested that patients should do more activities on the ground to promote blood circulation around the joints and accelerate the subsidence of edema; patients who still need to be bed-ridden can passively exercise the flexion and extension functions of the knee joints with the help of their family members or rehabilitation equipments. You can also elevate the affected limbs, heat therapy, massage and other ways to accelerate the venous return of the lower extremities, reduce edema. 2. Drug therapy: knee osteoarthritis caused by postoperative edema can also be drug-assisted treatment, such as oral diosmin tablets and other drugs to accelerate venous return to the lower extremities, reduce edema; oral meloxicam, celecoxib and other anti-inflammatory drugs, control inflammatory response; you can also choose to drip mannitol and other drugs to reduce swelling treatment. If the patient’s knee edema symptoms are not relieved, or accompanied by other symptoms, you should go to the hospital in time to see a doctor, to identify the cause of the targeted treatment. The above drugs should be used under the guidance of a doctor to avoid self-medication.