The rectum is the lower part of the large intestine, and it ends at the anus. Injury, inflammation, and infections that affect the anus and rectum can cause rectal pain. For instance, determining when the pain occurs — such as when sitting or during a bowel movement — and uncovering any additional symptoms can help narrow down the cause. Rectal pain has a wide variety of causes, from minor to serious.
Skip to content. Anal pain pain in the bottom can be distressing. But is often just the result of a minor, treatable condition. Many common causes of anal pain will improve with self-care treatments. See your GP if your pain is severe, doesn't improve after a few days or you have rectal bleeding.