Anal fissure: a pain in the butt
I know, that was a sick headline, wasn't it? But it's true. Anyone who has had an anal fissure will tell you that it's not pleasant and it can be very painful.
What is an anal fissure? It's an opening or tear in the anus (rectum), usually from the anal opening and the middle of the anus. They're not uncommon and anyone can get one.