This feeling in the thigh may be due to a lumbar disc herniation, a tendon pain symptoms are mostly nerve irritation symptoms, lumbar disc herniation is mainly due to the disease caused by changes in the position of the lumbar intervertebral disc, the outer lumbar intervertebral disc is fibrous cartilage, the middle is very easy to deform the nucleus pulposus, fibrocartilage is very good elasticity, toughness, resistance to compression. Once the human body is more than twenty-five years old growth and development stopped, then the body will begin to degenerate phenomenon, degeneration early mainly manifested as cartilage composition changes, the proportion of water in cartilage decreases resulting in the gradual loss of cartilage elasticity, fibrocartilage as well. The loss of elasticity of cartilage will be prone to rupture injury, the nucleus pulposus protrudes from the ruptured fibrocartilage to compress the lumbar nerve, resulting in pain where the lumbar nerve passes, that is, a tendon pain sensation.