Tips for treating scrape on tail?

 
Tips for treating scrape on tail?
Hi

My dog had a partial amputation of her tail last week. She'd broken the end of it and it died and so had to be removed. Anyway she got the bandage off it today and has since managed to scrape it on something. There is just a small patch of skin missing on the shaved part of her tail, near her stitches but not interfering with them. It seems to be hurting her and is driving her a bit nuts. The vets aren't available till morning and so I'm looking for some advice on at home treatments to help soothe it for her till morning.

Thanks in advance!