Hello! I’ve just noticed that my female rabbit, Mochi, has a “skin infection” on her left hind leg. It is residing under her long fur so I cannot really examine it thoroughly. But just tonight as she was doing the bunny flop and her left hind leg was showing, I’ve noticed that she bit off the fur above the “skin infection”. By the way, her fur is white.
The infected area, which is circle in shape and white in color, is about the size of a contact lens, and when you touch it it’s kinda flaky but hard to remove. I can see the skin on the corner of the circle thingy is reddening. If I’ll touch it she doesn’t react to it so I think she’s not that hurt but I think it’s bothering her.
Do you guys know what infection is this called? I really don’t have an idea since it is mochi’s first time to have this kind of infection. I need to know what it is so that I could find a solution for it. Thank you so much!! 
PS. Sorry for my bad english lol I am asian
PPS I can’t show you a picture of the infected leg because I recently lost my camera 

but here is a kawaii picture of my Mochi <3 <3 (they are in low quality since I used my webcam huhu)

sleeping mochi!

Mochi playing with Ramyeon in their digging box