I have been getting perioral derm. every winter for the past three years. In January I got my first case, and I now have my second. It has never been this bad before. It has taken over my face from my eyes down. I know there is not instant fix to this, but what else can I do. I am taking a Z-pack, cut all moistureizers, washing with cool water and dove soap... what else can I do?
Perioral dermatitis is a non-contagious eruption, so you can't give it to anyone. The hip and leg rash would have to be something else, so if it bothers you, you should check it out. Whatever your girlfriend has, it can't be perioral dermatitis, which is perioral, around the mouth.
I think that for clarity and reassurance, you should either see another doctor or else ask the first one to re-evaluate you and answer your questions definitively.
Take care.
Dr. Rockoff