Dilation of a pouch inlet stricture shouldn’t have any effect on leakage. Heck, I don’t think your leakage has anything to do with that stricture, either, but it could give you trouble if something gets trapped behind it or it narrows further. A dilation (generally with a balloon) is probably worth doing. At the same time, the problem you care most about - the leakage - needs to get proper attention, and not treated as less important than the stricture. It sounds like pouchitis, either incompletely treated or, unfortunately, antibiotic-dependent, is causing your leakage. There’s a possibility that in addition to causing the leakage pouchitis is what caused your stricture in the first place. I don’t remember how many courses of antibiotics I went through before I admitted to myself that I had to stay on them continuously, but my life has been much better since I got effective pouchitis treatment.
Here’s a link to an article about pouch strictures. Even if the text seems impenetrable the diagrams may be helpful in visualizing what’s going on: https://academic.oup.com/ecco-...cle/12/3/369/4636588
In your situation I might suggest to my doctor that I wanted to get the pouchitis under solid control before tackling the stricture. Alternately they can be addressed at the same time. Good luck!