Compression of the cauda equina nerve can lead to fecal incontinence. Compression of the cauda equina is usually caused by mechanical factors, such as lumbar disc herniation or lumbar spinal stenosis that compresses the cauda equina, causing edema and degeneration of the nerve, resulting in cauda equina dysfunction and affecting bowel function. It may also be caused by trauma, such as spinal fracture with dislocation compression of the cauda equina, numbness in the perineum is more obvious, if the persistent numbness is more serious, and the patient may have fecal incontinence. So the cauda equina is compressed, this situation is quite serious, need to go to the hospital to take further treatment, if delayed treatment may cause fecal incontinence.