A herniated lumbar disc does not usually cause numbness in the hands. When the herniated lumbar disc nucleus pulposus tissue compresses the nerve roots, it will cause radiating pain in the lower limbs and numbness in the feet, which can also manifest as numbness in the lower legs. Hand numbness is generally considered to be caused by cervical spondylosis, which can manifest as hand numbness and hand pain when a herniated cervical disc presses on the cervical nerve roots. Hand numbness can also be due to carpal tunnel syndrome, which is the numbness of the 1st-3rd fingers caused by the compression of the median nerve by the transverse carpal ligament, and is more obvious at night. Hand numbness can also be due to elbow canal syndrome, which is the compression of the ulnar nerve at the left elbow canal, causing numbness of the little finger and ring finger.