Sorry, I meant to say, if it turns out to be nothing nasty, then something old fashioned like zinc and castor oil cream/ointment would probably work to heal it. We use that quite a bit on animals as it's harmless and doesn't sting, so they tend not to try and get it off. We also have a pot of brown stuff, made up by the pharmacist which we use too, in cases that are slow to respond i.e sweet itch sores and if you want I can see if I can read the label!