There are more causes of pain in the posterior fossa of the leg, different treatment methods for different causes, you can use to avoid sports, hot compresses, surgical treatment and other methods, as follows: 1, avoid sports, hot compresses: the most common cause is hamstring strain, probably due to the usual excessive sports or frequent knee joint pulling activities, which can cause hamstring strain injury, strain, treatment must be avoided for 2-3 The treatment must be to avoid sports for 2-3 weeks and use localized hot compresses to improve blood circulation in the popliteal fossa and improve muscle inflammation, thus relieving the pain. You can use knee pads to protect the knee joint, enhance the stability of the joint and reduce the recurrence of pain. 2, surgical treatment, etc.: may be caused by popliteal cysts, mainly due to the joint fluid in the joint cavity from the weakness of the joint capsule at the popliteal fossa, forming a mass at the back of the knee joint, treatment is recommended to perform arthroscopic surgery to remove the cysts, so as not to recur, while you can use knee pads or elastic bandages The knee pad or compression bandage can be used to improve the stability of the joint and relieve the pain in the posterior fossa of the leg.