I just scratched my leg & tore my jeans off

This is not a wind up! A pair of Rockports that I've owned for about a year, wore all day yesterday & today and I've just torn them up like newspaper.
At a guess I'd say I've come into contact with bleach or battery acid, either that or somebody is trying to bump me off
lol.
The only saving grace is it happened at home & not down town
lol