Acne is one of the most common skin conditions in the world, affecting adolescents and adults, especially in females, even if they didn’t have teenage acne. How we treat acne has evolved over the years as we learnt more about the skin and its various conditions. Acne isn’t caused by a lack of hygiene or ‘dirty’ skin – so no amount of cleansing, scrubbing or exfoliating will get rid of it. In fact, this can inflame skin and make everything…