Lumbar disc herniation vulvar numbness belongs to the manifestation of cauda equina syndrome, lumbar disc herniation will lead to the cauda equina nerve compression to appear the manifestation of cauda equina syndrome. The cauda equina is located in the lumbosacral segment, starting from the lower edge of the spinal cord cone and extending all the way to the caudal bone area, penetrating out from the sacral fissure. The so-called cauda equina syndrome refers to the narrowing of the spinal canal due to various reasons, causing the cauda equina to be compressed, resulting in a series of corresponding neurological dysfunction, and the numbness of the vulva is a manifestation of the abnormal function of the cauda equina. The root cause of the symptoms of vulvar numbness in lumbar disc herniation lies in the degenerative disease of lumbar spine, which can lead to thickening or calcification of the ligamentum flavum around the vertebral body, and osteophytes between the vertebral bodies, resulting in the narrowing of the vertebral canal, which will cause compression of the cauda equina nerve and the spinal nerve root, leading to injury of the cauda equina nerve, which will lead to the sensation of the saddle area, and then it can manifest as the symptom of vulvar numbness. If the symptoms of vulvar numbness are serious, or if the symptoms do not improve, the patient should go to the hospital in time for treatment.