Acne in adults is a complex issue. There is another problem with adult acne. Most of the products on the market are intended for the treatment of acne in adolescents. But they contain substances that irritate the skin of adults. Apart from that, acne that develops in adulthood can last for years and may also cause the skin to age faster. Hormones also play a part here, as women have to deal with the hormonal changes accompanying menstruation and pregnancy. These are conditions that sometimes encourage the development of acne.