Well, if a fissure is a tear, I suppose you can have one if you still have your anus even if you're not passing stool?? Jan would be better able to respond to your question from a medical point of view....
I do want to ask, though, if you have any swelling. About a year after my perm ileo surgery, Barbie butt included, I experienced swelling along the incision site. It was very painful for one full day until the swelling burst and the pressure and pain were relieved. My surgeon never mentioned a fissure but did swab the area for infection (turned out there was none) and put me on a course of antibiotics. He said sometimes that, although the area was sewn shut, there may be tiny open spots where bacteria could get in and shake things up. It happened only once and I haven't had a problem since.