Knee pain can be seen in osteoarthritis, meniscus injury, rheumatoid arthritis and gouty arthritis, etc. The treatment is mainly based on medication or surgery. 1. Osteoarthritis: for mild cases, it mainly includes paying attention to rest, avoiding excessive activities of the knee joint, and can be combined with infrared light and other physical therapy, and ibuprofen and other medications can be used as prescribed by the doctor when the pain symptoms are obvious, and surgical treatment if necessary. 2. Meniscus injury: the mild cases can be recovered through the above conservative treatments, while the serious cases need to go to the hospital for surgical treatments such as meniscus molding and meniscus suture. 3. Rheumatoid arthritis and gouty arthritis: knee pain symptoms can also occur, in addition to rest, oral loxoprofen sodium and other medications for symptomatic pain relief, but also need to further use of anti-rheumatic drugs such as methotrexate and other gout medications such as febuxostat, etc., and if necessary, can also be considered for surgical treatment. In addition, it can also be seen in the knee ligament injury, knee tumor and other causes of local pain, it is recommended to go to the hospital in time to avoid delays in the condition.