Do you suspect you have one? Certainly we can have pain passing stool as the result of rectal-inflammation during a flare. The biggest difference between UC inflammation and a fissure is this:
1.) UC pain is only while passing stool, not after bms, and does not hurt to sit on your bottom.
2.) Fissures are pains during BMs that persists after completing it. You essentially have muscles spasming as a result of the anal muscle tear, spasms are painful, and that spasming continues after we are done pooping lasting a while after we are done. Fissures can also be painful to sit down on.
If it only hurts while you're pooping then it's just your garden variety of UC rectal inflammation.
Moderator Ulcerative Colitis
John, 40, UC Proctosigmoiditis
Rx: Remicade @5mgs/kg/6wks; daily 75mgs 6MP, 4.8g generic-Lialda, and rowasa
With UC, we're much like a footballer on our way to the bathroom: running, jumping over and agilely dodging around obstacles, and knocking out-of-the-way all that are in our path to the end-zone.