goodtoknow says: Perioral dermatitis is a rash of small red spots you can get around your mouth from your chin up to your cheeks. It normally affects women from their 20s to 40s and looks a bit like acne. It's not normally painful, but can be itchy. You can have just a few spots or a mass of them. The skin in between the spots may be red too, whereas the skin just outside your lips isn't normally affected. Cosmetics, steroid creams, fluorinated toothpaste, sunlight, wind, hormonal changes and the contraceptive pill can all be triggers. Antibiotics can help clear it.
For a full medical explanation of the causes, symptoms and treatments of perioral dematitis from patient.co.uk, read on.
Perioral dermatitis is a rash that develops around the mouth. The word perioral means 'around the mouth'. Dermatitis means 'inflammation of the skin'.