The pain in the hamstring of the back knee fossa may be caused by physiological factors such as excessive flexion and extension, or it may be caused by pathologic factors such as popliteal cyst and trauma.
1. Physiological factors: due to jumping, dancing and other knee flexion and extension training, can lead to local soft tissue fatigue due to overstretching, local lactic acid accumulation, can cause popliteal fossa at the soft tissue pain symptoms, after resting can be gradually relieved.
2. Popliteal cyst: popliteal cyst occurs because of the abnormally high pressure in the joint cavity, which is caused by the flow of joint fluid from the gap, making the bursa inflated, and the pain and swelling at the back of the knee joint or the back of the medial side of the knee joint as well as the stiffness of the joints will mainly occur.
3. Trauma: If the popliteal fossa of the knee is subjected to violence or joint sprain, it can lead to the surrounding soft tissue injury, which can cause pain, activity limitation and other symptoms, accompanied by localized swelling and subcutaneous bruising.
There may be other reasons for the pain in the hamstring of the back knee fossa, such as rest can not be relieved, it is recommended that the patient timely hospital consultation, after clarifying the cause of standardized treatment.