I like posts where the whole combination of symptoms - fissure, hemorrhoids, abscess, etc. - is just called "piles". It somehow makes a condition that's in an awkward place and hard to discuss a bit more approachable and friendly, if that's the right word.
And yes, from my own experience I'd say that it's a condition that takes a long time to cure - I'm already in my third year of something that's been diagnosed as "fissure". It keeps on healing up and then tearing again. I've concluded that it's just something I have to live with, with pain that varies from one week to the next, but never goes away entirely.
The various medications - Miralax, lactulose, GTN ointment, etc. - help, but don't bring about a final healing. I haven't yet opted for Botox and/or LIS - guess I'm saving that for when there's really no alternative - and in the meantime just trying to get on with my life as best I can, though it's not always easy.