How come I continue to have acne in my late 20s? At its root, Grownup acne is due to the identical things that bring about teen acne: excess pores and skin oil and germs. Any changes in hormones, which include Individuals introduced on by pregnancy and menstruation, can bring about extra oil. Women of all ages who smoke also appear to be much more liable to acne. Acne tends to operate in family members, so if a dad or mum had Grownup acne, you happen to be at greater possibility. Folks can get acne into their 40s and further than.