this is a good question and you're wise to think in terms of avoiding the spread of any contagious condition. the good news is perioral dermatitis isn't contagious. dermatitis means skin (derm) inflammation (itis). because dermatitis is simply an inflammation of the skin (though it's often accompanied by cracking and flaking) it's not something you spread to someone else. the "perioral" part of your diagnosis merely denotes the location of the dermatitis. "peri" being "around " and "oral" being "the mouth. " skin inflammation around the mouth. that's all it is. all that said you still may want to keep your makeup brushes to yourself. cracked flaky inflamed skin creates a route for someone else's viruses (like oral herpes) or bacteria to enter your skin. you can't spread your dermatitis to someone else but that doesn't mean someone else couldn't spread an infection to you. wishing you well!
can perioral dermatitis spread on make-up brushes?