S3 nerve root

The S3 nerve root is a nerve originating from the lower part of the spinal cord, specifically the sacral region. It plays a crucial role in controlling muscles and sensation in areas such as the buttocks, genitals, and parts of the thighs and feet. This nerve also helps manage functions like bowel and bladder control. When the S3 nerve root is compressed or irritated, it can cause symptoms like pain, numbness, or weakness in these regions. Because of its location, issues with S3 are often associated with conditions affecting the lower back or pelvis.