I hope she doesn't get bad cluster ones with it. I had a fierce outbreak on the side of my left bicep a while ago. No matter what I treated it with, it just got so out of control my entire upper arm ended up being raw, broken skin. I had to take a bunch of antibiotics and steroids to heal it up. I can't imagine having had to deal with that in my later years - I was lucky it didn't get infected really - I was in my 30's and still pretty mobile so getting to the clinic was pretty easy.

But if your mother is anything like mine, she probably needs to be basically walking around with a dislocated arm hanging from her shoulder socket before she'll even consider going near a doctor. Lol. Mothers.