I was holding my guinea pig Pippa when I noticed a strange spot on her foot and after further checking it turned out to a weirdly circular scaly spot on her back leg on the outside of it. She has towel bedding as a vet recommended it after she turned out to be allergic to the Katee comfort bedding and in waiting on a package to give her and her sister fleece bedding instead. I'm just worried she hurt herself or wondering if there's someone who knows what this is and what I should do.
Here's a picture of whats on her foot:
Here's a picture of whats on her foot: