The appearance of cysts behind the bend of the leg, according to the size of the cyst and the pressure symptoms, can be given observation, physical therapy, pumping fluids, injections of drugs, surgical resection, etc., the specific need to follow the doctor’s instructions. 1. Observation: If the cyst behind the bend of the leg is relatively small, without obvious redness, swelling and pain, and without numbness, it can be observed first, and a small number of people may be absorbed. 2. Physical therapy: after the cyst appears symptoms, you can take appropriate functional exercises, local hot compresses, ultrashort wave therapy, etc. to relieve local symptoms. 3. Fluid extraction and drug injection: If the patient is in poor physical condition and cannot tolerate surgery or is unwilling to undergo surgery, the patient can be injected intra-articularly with drugs such as prednisolone or triamcinolone acetonide after puncture and fluid extraction, which can also achieve certain results. 4. Surgical resection: It is a common treatment method for cysts behind the bend of the leg, which is divided into open surgery and minimally invasive arthroscopic surgery. When you find an abnormal mass behind the bend of the leg, and gradually increase in size, accompanied by pain and discomfort, you should consult the doctor in time, carry out the corresponding examination, clarify the cause, and actively cooperate with the doctor to avoid delaying the condition.