A herniated lumbar 5-sacral 1 disc will produce the following symptoms of nerve injury after compression of the nerve roots and dural sac: First, a herniated lumbar 5-sacral 1 disc compresses the lumbar 5 nerve roots, and compression of the lumbar 5 nerve roots will lead to abnormal skin sensation on the posterior lateral aspect of the lower leg, usually with pain and numbness of the skin there. Second, it will also lead to abnormal skin sensation in the thumb and the dorsal proximal end of the thumb, also with symptoms of pain and numbness. Third, lumbar 5 sacral 1 disc herniation compression of the dural sac and spinal cord will lead to cauda equina injury symptoms, more common is the second stool function and saddle area sensory abnormalities.