I'm pretty sure I have this. What seems like acne on my chin that never goes away. It has migrated to the side of my mouth. Red and bumpy, sometimes crusty. They say flouride toothpaste, topical steroid creams, and thick face creams cause it. I can go out tomorrow and buy some Toms, I don't use topical steroid creams. I use Cetaphil SPF 15 and differin gel. Maybe I should d/c that in favor of a all physical sunscreen. IDK!
They say Tetracycline (oral) and Azelaic acid (topical) can help. I'm going to my doctor and see if she'll prescribe for me. There is some theory that it may be related to yeast/bacteria in the skin.
Has anyone had experience with this, and what worked for you
http://dermnetnz.org/acne/perioral-dermatitis.html