Lumbar disc herniation is the compression of adjacent nerves due to the displacement of disc tissue into the spinal canal. The sensation of falling down is mainly due to the herniated disc nucleus pulposus compressing the spinal canal, causing the cauda equina to be compressed. When the function of the cauda equina is impaired, lumbosacral pain, radiating pain and weakness of the lower limbs, sensation of both lower limbs, abnormal sensation of the perineal area and other manifestations, followed by numbness of the perineal area, sensation of falling and abnormal urination and defecation, etc., and some patients even have constipation, urinary retention and other clinical manifestations. However, if the lumbar disc herniation seriously affects urination and defecation, it is necessary to check whether there is nucleus pulposus prolapse, nerve root and spinal cord compression. Timely medical examination and targeted treatment.