Soreness of the left posterior thigh, mostly seen after exertion, local muscle injury or contusion after the formation of hematoma, the typical symptoms are local pain and a sense of soreness, severe will also appear limb swelling, usually need to rest and physical therapy, the symptoms can gradually improve. Some patients are due to subcutaneous tissue or muscle tissue with occupying lesions, commonly benign tumors, with lipoma and fibroma as the most common, if necessary, also need to choose further surgical resection. Some patients with lumbar disc herniation may also experience pain and discomfort in the lower limbs, especially when the local nerve root is compressed, the symptoms will be more obvious, and further surgery is needed if necessary. Usually need to pay attention to not excessive exertion and weight bearing, can be appropriate for local physical therapy, massage can be improved.