That reminds me of trying Red Arrow athlete feet medicine on my jock itch and discovering it was brutal, but the next day the dead skin peeled off in a sheet and there was no jock itch left.
I subsequently relayed that cure to a college roommate, along with the caveat it burned a lot. He was desparate for a cure that worked so dropped his drawers and tried it anyway and I can still see his shoe prints on the wall over his bed and his screaming, "You son of a *****, you son of a *****, you son..............et al".