My 12 1/2 year old miniature schnauzer has a bump on her face I discovered two days ago. The bump was originally pink and matted over by hair. She got a full hair cut about a month ago so the bump wasn’t there before that. We’ve been putting Neosporin on it and a liquid band aid but after cutting more hair from the wound which had scabs over it with the hair, it is red and still fully exposed with a black edge. Not sure what this could be. Is it life threatening or do I need to take her to the vet?