Today we've not only got a fan favorite back on the show, we are going to talk about a topic that I've only had ONE other guest talk about- perioral dermatitis. I know firsthand from a handful of clients I've worked with that perioral dermatitis is not only frustrating because it's hard to diagnose and find the root cause, but it's embarrassing because it is a lot of times on the face. So, let's dive in! Today's guest is Dr. Julie Greenberg is a licensed Naturopathic Doctor (ND) and Registered Herbalist RH(AHG) who specializes in integrative dermatology. She is the founder of The Center for Integrative & Naturopathic Dermatology Inc, a holistic clinic that approaches skin and hair problems by finding and treating the root cause. She is also the founder of RootCauseDermatology.com, a medical education website that trains functional medicine practitioners on how to treat dermatological conditions using her cutting-edge approach. Dr. Greenberg holds degrees from Northwestern University (BA), Stanford University (MBA) and Bastyr University (ND). Her research on the gut microbiome of acne patients has been published and presented at multiple conferences. She teaches dermatology classes at naturopathic medical schools and is a highly sought after speaker at conferences across the U.S. If you've ever had perioral dermatitis, how long did it take to get a diagnosis and did you find relief?  Tell me what worked for you or what didn't in the comments below! In this episode: What exactly is perioral dermatitis and why does getting a diagnosis seem so unclear? Some root causes + triggers of perioral dermatitis Why Dr. Greenberg might treat perioral derm patients similar to acne patients How Malassezia, parasites, and demodex mites could be involved in PD Should you stop using fluoride or look into your oral microbiome? Some natural treatment options to consider Quotes "Malassezia is a fungal organism. It's a yeast, which is a single-celled fungal organism. It's on everybody, but sometimes it can cause skin disease. And in the acne section, we talked about acne can be both bacterial acne, that kind of classic cutibacterium acne, but it can also be fungal acne, which is like a Malassezia folliculitis." [07:42] "I have recommendations for toothpaste, mouthwash, tongue scraper, and dental flosses, because whatever's in the mouth, that oral microbiome, it is going to come out and affect around the mouth." [25:02] Links Find Dr. Greenberg online | Instagram | take her courses Healthy Skin Show 173: Malassezia: The Bug Behind Many Fungal Skin Problems w/ Dr. Julie Greenberg Healthy Skin Show 149: How Staph Aureus Wrecks Your Skin w/ Dr. Julie Greenberg Healthy Skin Show 220: The Gut Microbiome Of Acne [NEW RESEARCH] w/ Dr. Julie Greenberg Healthy Skin Show 225: Topical Steroid Withdrawal (TSW)- Is It Just A Waiting Game? w/ Dr. Julie Greenberg Healthy Skin Show 243: Functional Approach to Alopecia Areata w/ Dr. Julie Greenberg Healthy Skin Show 136: Alternative Solutions For Rosacea w/ Dr. Peter Lio Try Risewell for some great toothpaste and oral care products (no fluoride). Use HEALTHYSKINSHOW for 10% OFF!