The secret recipe for tendon pain in the posterior knee fossa lacks scientific basis, and it is related to tendon injury, osteoarthritis, popliteal cyst, etc., which needs to be treated with general treatment, medication or surgery for the cause. 1. For tendon injuries, rest should be paid attention to and avoid activities as much as possible; analgesics such as ibuprofen can be taken orally as prescribed by the doctor; if rupture occurs, surgical repair is needed. 2. For osteoarthritis, proper rest should be taken and unreasonable exercise should be minimized; non-steroidal anti-inflammatory drugs such as ibuprofen and intra-articular injection of sodium hyaluronate can be used to alleviate the pain as prescribed by the doctor; if the conservative treatment is ineffective, surgical treatment can be considered. 3. For popliteal fossa cysts, ibuprofen, diclofenac sodium and other drugs can be used as prescribed by the doctor; for cysts that are large and the effect of conservative treatment is not good, or affecting the activities of the knee joint, arthroscopic surgery is feasible. It is recommended to go to the regular hospital in time, clear cause, standardized treatment under the guidance of the doctor, do not blindly use drugs.