 [ Symptoms ] can perioral dermatitis spread on make up brushes [ Disease ] this is a good question and you are wise to think in terms of avoiding the spread of any contagious condition the good news is perioral dermatitis is not contagious dermatitis means skin derm inflammation itis because dermatitis is simply an inflammation of the skin though it is often accompanied by cracking and flaking it is 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 is 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 is viruses like oral herpes or bacteria to enter your skin you can not spread your dermatitis to someone else but that does not mean someone else could not spread an infection to you wishing you well