A cyst behind the knee socket is a localized benign lesion, clinically known as a popliteal cyst. Treatment options need to be selected according to the severity of the cyst, small cysts can be treated with medication, physical factors, and large cysts usually require surgical treatment. 1. Medication: If the size of the cyst behind the knee socket is relatively small and the situation is not particularly serious, you can consider taking non-steroidal anti-inflammatory drugs, such as Celecoxib, to help promote the absorption of the cyst and alleviate the symptoms. 2. Physical factor treatment: Shock wave with magnetic heat therapy can break the local cyst and promote the absorption of fluid, thus achieving the purpose of relieving symptoms. 3. Surgery: If the cyst behind the knee fossa becomes bigger in size and compresses the surrounding tendons, it is necessary to consider surgical treatment, such as cystectomy, in order to restore the function of the knee joint. When a cyst behind the knee socket occurs, it is easy to cause local pain, swelling and other symptoms, which need to be targeted treatment under the guidance of a professional doctor to prevent the cyst from continuing to increase in size in the later stage. During the recovery period, pay attention to rest, do not do too much weight-bearing exercise, so as not to affect the recovery.