What do you look for in a litter box mat? It's got one main job: to keep litter from scattering all over the place. It would also be nice if it didn't clash with its surroundings, and it fit snugly in the space it needs to fill. Instead of buying a "litter box mat", which may or may not fulfill any of these criteria, consider using a yoga mat!
Our tuxedo cat Gumby is FIV+. It may be due to his condition that he suffers from terrible allergies that used to leave his skin in pretty bad shape. When we first had him as our foster kitty, he had bumps on his skin at the base of his tail and at his haunches. We could see he was in misery from the itching -- it was awful. It was recommended we ask the vet for a steroid shot to help relieve the itching. This did wonders for his comfort, but we still had to get to the bottom of the skin issues.Something else that helps with skin irritations and allergies is this topical hydrocortisone spray from Excel.