Novel facial cosmetic area ‘O zone’ shows unique characteristics in sebum excretion and acne lesion distribution

Abstract

We suggested that the O zone is an independent facial zone, which showed a moderate-to-high sebum secreting area, maintained the acne lesions development by age, and predominated acne lesions in the male acne patients than female acne patients. Therefore, the O zone should be separated from the usual cosmetic T zone, and NT zone should replace the old T zone.