The University of Oulu Nov 27 2025 Adult acne is more common than often assumed. According to research from the University of Oulu, around 31 per cent of 35-year-old Finnish women have acne on the face or back. Yet many do not recognize their symptoms and acne frequently remains untreated. The study involved almost 1,900 women, each of whom had their face and back photographed without make-up. Dermatologists assessed the presence and severity of acne on the basis of the images. Acne was most