When popliteal pain occurs, according to other concomitant symptoms and medical history, consult orthopedics, pain medicine, rheumatology and rehabilitation departments. 1. If there is a lump in the popliteal fossa, which is soft and swollen when pressed, and gradually increases in size with time, and there is limitation of knee flexion and extension along with pain, it may be a popliteal cyst, and it is recommended to consult orthopedic department. 2. If the manifestation of swelling, pain, limited joint movement, suspected synovitis, osteoarthritis, orthopedics, pain department. 3. If the nature of pain is related to climate change, and the pain is more obvious when it is cloudy or raining, it is suspected to be rheumatoid arthritis, and it is recommended to hang up with the Department of Rheumatology and Immunology. If there is a history of hyperuricemia and gouty arthritis is suspected, rheumatology should also be consulted. 4. If there is clear external violence causing pain in the popliteal fossa and meniscal injury is suspected, orthopedics is recommended. 5. If popliteal pain occurs after surgery, it is often related to the resumption of postoperative functional exercises, and it is recommended to consult the Department of Rehabilitation for this type of pain. Patients can choose the appropriate department according to their own symptoms, and under the guidance of the doctor to clarify the cause of the disease, early treatment.