The info I get from looking online tells me that the majority of people with fissures have them just at the opening of the anus. This isn't the case with mine. It feels a good few cms up and it's not visible at all on the outside. I've never actually seen my fissure and neither has any doctor. I think a surgeon who drained an absess on my bum may have had a look up with a proctoscope while I was under but I never got confirmation of that. I've had an MRI too and still don't know if it was visible on that.
My question is, can you see your fissure? My GP told me that they can be located further up sometimes but I still worry why i'm different to the typical case.