Calf walking feeling pain inside, the following common causes: 1, often lower limb strenuous exercise of the population, usually appear local muscle or myofascial chronic pulling inflammation, appear local activities when muscle pulling pain. 2, may be sciatica, if accompanied by thigh, buttock, or even lumbar pain, it may be a lumbar disc herniation or pyriformis muscle syndrome, caused by the lower limb nerve pulling pain, usually manifested in the posterior side of the calf or anterior lateral skin, muscle nerve pulling pain mainly. 3, may be local bone or soft tissue tumor, can be confirmed by taking a local X-ray. Traction pain, usually manifested as the posterior side of the calf or anterolateral skin, muscle nerve pulling pain mainly. 3, may be a local bone or soft tissue tumors, can be diagnosed by taking a local X-ray.