Welcome to the National Rosacea Society Rosacea is a chronic, acne-like condition of the facial skin that may affect as many as 13 million Americans. It typically first appears when people reach their 30s and 40s as a flushing or subtle redness on the cheeks, nose, chin or forehead that comes and goes. If left untreated, rosacea tends to worsen over time. As the condition progresses, the redness ...