While becoming a certified dermatologist requires medical school, introductory or advanced aesthetics courses often cover cosmetic dermatology principles. This content area focuses on the science of the skin, its structure, common conditions, and non-surgical treatments. You’ll learn about different skin types, how to identify issues like acne, rosacea, and sun damage, and the proper use of skincare products and ingredients. Courses may also delve into aesthetic procedures such as chemical peels, microdermabrasion, and laser safety. This knowledge is crucial for beauty professionals who want to understand the foundational health of the skin before performing any cosmetic service.