Ohhh, I hate the burn! It's the worst - I've found that lidocaine before going to the washroom, then voiding, then sitting in a hot sitz bath for about 20 minutes, followed by drying off extremely well and applying whatever cream works best helps.
When my stool gets very acidic I try to bulk it up a bit (white bread, rice, bananas) - so long as it doesn't cause any straining.
Good luck, I hope some relief comes to you. I'm sending you positive healing vibes
