I recently picked up an American green tree frog from my local pet store and it has a really bad abrasion on its face extending from its nose almost to its eyes in a triangle that covers the entire region between. When I first placed him in the enclosure he went into the water then stuck to the side then swam towards some rocks and vanished for a couple days. When putting the lid back onto it yesterday he reappeared. He stayed up on the glass for a little while then made his way to the cup that my bromeliad forms and slept there for the rest of the day, this morning I'm not sure where he is. I was wondering if there was anything I can do for his nose I don't want him to get an infection or for it to get worse.

