Overview

• On July 17, Hailey Bieber shared a close-up of her perioral dermatitis flare on Instagram Stories while in Europe.
• Perioral dermatitis combines acne-like bumps with an eczema-like itchy rash that can appear around the mouth, nose, eyes or chin.
• Dermatologists say common triggers include heavy moisturizers, topical steroids, fluoride toothpaste, essential oils, hormonal shifts and stress.
• Bieber’s flare-up regimen consists of water rinses followed by prescription azelaic acid, a hypochlorous acid spray, clindamycin and Rhode’s Glazing Milk.
• Experts warn that the rash is often mistaken for acne or rosacea and that its underlying causes remain poorly understood.