Sounds as though this is related to Hemorrhoids. Some things that can cause is this include. Inadequate intake of fiber, sitting too long, straining to have a bowel movement or hard stools.
Below are two excellent sites that explain about Hemorrhoids as well as additional information on treatment and prevention.
read here read here
Hope this helps, If you need anything else please feel free to ask. If you found this helpful don’t forget to click the *
ACCEPT* button and leave *POSITIVE* feedback.