Update on Facial Erythema in Rosacea.

Dermatologists are cognizant of the multiple clinical manifestations of rosacea, particularly persistent facial erythema, which has been deemed to be the most prevalent diagnostic feature and often poses a significant negative impact on quality of life. To address the need to recognize rosacea as a single disease with multiple potential phenotypes, a new classification system has been developed by 28 clinical and scientific experts worldwide.