That could actually be a bacterial infection... I have had this happen to dart frogs.
My suggestion is to look up a few remedies for frog diseases. I used a cream that deals with bacterial/fungal infections in/around the ears, eyes, nose, and mouth of cattle. Sadly I cannot remember the name.
Nitrafurazone may work quite well.
i've been trying a topical antibiotic, but it was uneffective. it's hard to keep medication on the skin of a fossorial creature.
next time, i'm definitely using damp foam. :wall: