Our experts answer your most frequently asked questions.
Acne usually starts at around 12-15 years for boys and 11-12 years for girls, but sometimes as early as 8-9 years.
The hormones produced during puberty, by girls as much as by boys, stimulate the sebaceous glands: they produce excess sebum, rendering the skin oily and shiny. These sebaceous glands are more abundant on the face and torso.
Meanwhile the bacteria mainly responsible for acne - P.acnes - feeds on the excess sebum and spreads. This bacteria plays a central role in acne because it stimulates:
The P.acnes bacteria is particularly difficult to beat because it has developed an amazing resistance mechanism: it produces a glue-like substance called biofilm that acts as a protective shield. This shield allows the bacteria to resist the skin's natural defenses as well as certain treatments.
This is why acne tends to settle in.