Not sure if this is relevant but years ago I read that pineapple, paw paw and kiwi fruit all contain an enzyme that actually breaks down flesh - this is why they are often included in a tenderiser mix. When I was a kid I disliked pineapple as it made my tongue feel raw. I never thought of this until about five years ago when my mouth was 'volcano craters' and speaking was a real challenge. I tried everything from the chemist and the nurses gave me an assortment of rinses and gels - nothing eased the pain. I created my own grated ginger poultice and bought ginger candy at an Asian grocer - that was the only thing that eased the pain, I also made my own ginger and honey tea using grated ginger. I pulverised my food into a 'baby food' mash and when possible ate with a straw. I also lost a few kgs. As @Locksley said, this business is not fun, we are with you!
