There are many reasons for knee pain, such as injury, rheumatoid arthritis, gout, etc., and the treatment should be chosen according to the specific reasons. 1. injury: such as strenuous exercise, bad walking posture, etc., resulting in knee ligament or meniscus injury, need to pay attention to rest, reduce activities, can be appropriate hot compresses, promote blood circulation, if the pain is serious, you can choose diclofenac sodium tablets, indomethacin tablets under the guidance of the doctor and other drugs, to relieve pain. 2. rheumatoid arthritis: inflammatory reaction of joint tissues, causing knee pain, it is recommended to eat a balanced diet, appropriate protein supplementation, under the guidance of a doctor to choose methotrexate tablets, ibuprofen extended-release capsules and other drugs to ease the pain, if the drug does not have a good effect and the joints appear deformed, you can choose to have surgery to correct the deformed joints. 3. Gout: Uric acid salts are deposited in the knee and form crystals, resulting in redness, swelling and pain in the knee. It is necessary to control the intake of food containing high purine, and choose drugs such as colchicine tablets, allopurinol tablets and febuxostat tablets under the guidance of the doctor, so as to promote the excretion of uric acid, reduce the formation of uric acid and alleviate the pain, and surgery can be chosen to eliminate gout stones and correct deformed joints, if necessary. If the knee pain, it is recommended to go to the hospital for examination, to clarify the cause of the disease, active treatment, to avoid delaying the time of treatment.