I have a bump or boil right around the hole of my anus and it's been itching a lot , what could this be?

Can be: most likely an external hemorrhoid or an abscess. f no fever likely the hemorrhoid. avoid diarrhea/ constipation. if fever or increased swelling, pain or bleeding see a colon and rectal surgeon for proper evaluation

A few things: This could be several things such as an inflamed hemorrhoid, rectal abscess, boil, carbuncle, inflamed cyst, inflamed follicle, etc. The definitive answer will be forthcoming from a good physical examination from a health care provider, and then the best treatment would be able to occur. Best wishes.