@JJA posted:A fistula is like a little tunnel that starts in the re tap/anal area and leads away and out-sometimes creating a tunnel from the rectum/anal area to the vagina, or sometimes just from the rectum/anal area and out through the skin of the buttocks (or sometimes the tunnel doesn’t connect to anything (yet)-just tunnels off. They are more prone with Crohns than UC, but also not uncommon to happen with UC at the site of the anastomosis (where the j pouch is sutured to the rectal cuff). They can be hard to treat.
A fissure is a tear in the tissue-can happen internal of the anus or on the skin leading out. It can feel like you are pushing out shards of glass when you eliminate if you have a fissure.
Thank-you