Sorry to say that the butt burn after take down is miserable! A lot has to do with your diet, you really need to watch what you eat. I used the Nupercainal & Calmoseptine, flushable baby wipes, the softest toilet paper, and most important was getting a squirt bottle filled with water that I still use after each bm. Just make sure that you are completely dry before using any of the creams. I do remember sitting in the bath tub at night crying after eating something I didn't know would cause the dreaded burn! It will get better, but it does take about a year to get thru to your new "normal".
Hope you find relief soon!