The knee socket is the popliteal fossa. The common causes of knee fossa tendon pain include osteoarthritis, synovitis, popliteal cyst, and hallux valgus injury, etc. The pain symptoms can be relieved by general treatment, physical therapy, medication, and surgery. 1. Osteoarthritis: If the pain is caused by osteoarthritis involving the tendons in the popliteal fossa of the knee, you can take oral medications for osteoarthritis that nourish the cartilage, such as aminoglucosamine sulphate, aminoglucosamine hydrochloride and so on. If osteoarthritis is more serious, artificial knee replacement is needed to improve discomfort and quality of life. 2. Synovitis: With age or long-term overweight physical labor, the cartilage wears out and damages the joints, causing instability of the joints and inflammation around the joints, leading to synovitis. Microwave physiotherapy or far-infrared physiotherapy can be used to reduce local inflammation and relieve the symptoms of knee socket tendon pain. Oral non-steroidal anti-inflammatory drugs, such as ibuprofen, celecoxib, etoricoxib and so on, can also be taken to relieve the symptoms. 3. Popliteal cysts: If popliteal cysts are the cause of knee pain, and the effect of conservative treatment is unsatisfactory, it is often necessary to remove the cysts under surgery. 4. Meniscus injury: If the knee pain is caused by injury to the posterior horn of the meniscus, arthroscopic exploratory surgery, such as partial meniscectomy, is often needed. All of the above medications should be used under the guidance of a doctor, avoid self-medication. If the above symptoms occur, it is recommended to go to the hospital in time for early and regular treatment.