Medial knee pain needs to be treated according to the cause, including rest, physical therapy, anti-inflammatory and pain-relieving medications such as ibuprofen, and surgery. 1. Trauma: Injury to the medial meniscus, medial ligament and other tissues of the knee joint caused by collision, fall and other reasons can cause medial knee pain. When the injury is mild, braking and resting can be taken, cold compresses can be applied at an early stage, and when the pain is severe, anti-inflammatory and pain relieving drugs such as ibuprofen and sodium rosoprofen can be used, and surgical treatment can be taken if necessary. 2. Osteoarthritis: The degeneration and hyperplasia of knee cartilage cause pain, swelling and limitation of activities in the inner side of the knee joint. Conservative treatment is the mainstay, including rest, reducing activities such as climbing stairs, physical therapy such as baking, using painkillers such as celecoxib, and cartilage protectors such as glucosamine, etc. If conservative treatment is ineffective or symptoms worsen, surgery may be needed. If conservative treatment is ineffective or symptoms worsen, surgery can be adopted. 3. Localized fasciitis: aseptic inflammation of the localized fascia of the knee joint caused by long-term strain of the knee joint can cause pain, redness and swelling of the inner side of the knee joint. Treatment is mainly rest, local hot compresses, oral ibuprofen or topical diclofenac sodium ointment and other anti-inflammatory painkillers if necessary. If the pain on the inner side of the knee is not relieved, or accompanied by other symptoms, you should go to the hospital in a timely manner, to identify the cause and then give targeted treatment.