crusty bump on skin

Hi I’m Hannah and my rabbit Lola recently has gotten a bald red like crusty almost spot on her back and she’s not irritated when I pet over it and I wet it and took some of the white things out they weren’t bugs but the bedding from in her cage but her spot looks like it’s been burnt and cut and...

I was just petting my bunny around her eyes and noticed this hard crusty thing in her fur and on further examination it appears to be a raised, bumpy, black wart like growth. I will post pictures below. has anyone had experience with such a thing? Any suggestions of what could be happening?