My turtle has a "growth?" hanging off her nose

by Lydia
(California)

My gulf coast box turtle has chunk of thick skin hanging off her nose. She had been butting her nose against the plexiglass of her enclosure, and I think that is how the skin got irritated in the first place. It end of the skin is dry like a scab, but where it is attached to her it is pink and when I touched it hurt her. I have been trying to put neosporin on it, but don't want to block off her nostrils. Should I take her to the vet or will this eventually fall off? She is otherwise very active and eating well.