The reason why you can’t lift your leg after lumbar herniation is due to the herniated disc compressing the nerves. Lumbar protrusion medically known as lumbar disc herniation, lumbar disc herniation is the lumbar disc degenerative changes, nucleus pulposus tissue protrudes into the posterior or the spinal canal, if there is no nerve compression only lumbar pain and discomfort and so on. When the herniated disc compresses the nerves, the nerves will be damaged, and pain and numbness may occur in the innervated part of the nerve at the beginning of the compression. Heavier or longer compression may cause muscle dysfunction, including the inability to lift the leg, walking abnormally, and so on. Herniated lumbar intervertebral discs can not lift the leg should be promptly to the regular hospital, the doctor according to the symptoms, signs and auxiliary examination to determine the specific condition, according to the condition to give the correct treatment.