I noticed a small brown bump on the outside of the skin on my hedgehog Louie's hind foot. I didn't think it was anything until it doubled in size in a week. I inspect it and noticed it was a rough bump that was coming off. I decided to clean his cage and give him a bath and I noticed the bump came off, leaving a sore on his foot. Should I put anything on it or take him to the vet? It's hard to inspect it because he's still a young hedgehog and doesn't like being touched very much but I'm very worried that he has an infection or cut.