Knee pain can be applied with NSAIDs, nutritive cartilage drugs, anti-rheumatic drugs or nutritive nerve drugs depending on the cause. Causes of knee pain include synovitis, osteoarthritis of the knee, rheumatoid arthritis, traumatic fracture, lumbar intervertebral disc herniation and so on. 1. Synovitis: knee synovitis is caused by aseptic inflammation that stimulates the nerve endings around the knee joint, resulting in knee pain. Oral non-steroidal anti-inflammatory painkillers such as acetaminophen and bisacodyl capsules can be taken to improve pain symptoms. 2. Osteoarthritis of the knee: Osteoarthritis of the knee is mainly caused by degeneration of cartilage and the formation of bone capillaries, so you can take oral non-steroidal anti-inflammatory drugs such as Celecoxib, combined with nutritive cartilage drugs such as Glucosamine Hydrochloride Capsules to carry on the treatment. 3. Rheumatoid arthritis: Rheumatoid factor destroys knee cartilage and damages synovial membrane, which causes knee pain, so you can take oral anti-rheumatic drugs such as cyclophosphamide, azathioprine, leflunomide and other drugs. 4. Traumatic fracture: Traumatic knee fracture can be treated with oral non-steroidal painkillers such as acetaminophen and ibuprofen. 5. Lumbar disc herniation: Lumbar disc herniation compresses the nerve root, which can also cause knee pain, mainly radiating pain in the lower limbs, which can be treated with oral non-steroidal anti-inflammatory drugs such as diclofenac and other combined nutritive nerve drugs such as methylcobalamin and other drugs. There are many other causes of knee pain, such as tumors, infections, etc., should be timely to the hospital, improve the examination to clarify the cause of the disease, follow the doctor’s instructions for targeted treatment, not blindly use their own medication, so as not to cause adverse consequences.