Aging is no fun......not even for dogs. Hope she feels better.
hate when that happens!
If its a "hot spot" it may take some time to heal. A boil? Wondering if from an insect bite... I hope you let us know. I am sure she will heal faster than a dog-pal like mine that has long hair....
Poor thing - and you, too. I hope it's something that's quick, easy and cheap to take care of. :)