If the knee cyst is asymptomatic, it can be observed and not treated for the time being. If there are clinical symptoms, the treatment is mainly surgical resection. If the popliteal cyst is small and the pressure on the surrounding tissues is not obvious, it can be left untreated for the time being, and the treatment should be based on observation, and the ultrasound should be rechecked every six months or so to observe the growth. If the popliteal cyst is large, causing pressure on the surrounding tissues and symptoms such as swelling and pain in the popliteal fossa and calf, conservative treatment is ineffective, and the only effective treatment is surgical resection. Surgery can be minimally invasive arthroscopic surgery or through open surgery. It can be cured after resection, but there is a certain recurrence rate. Knee cysts are commonly known as knee popliteal cysts, which are located in the popliteal area on the posterior side of the knee. It is formed due to increased exudation of synovial fluid, increased pressure, and fluid entering the popliteal fossa through a weakness in the posterior wall of the joint. A popliteal cyst is a benign tumor that is lined with yellow or yellowish jelly-like fluid. If a popliteal cyst of the knee is found, the patient is advised to go to the hospital for medical examination, complete the examination and follow the doctor’s instructions for treatment.