Puberty coincides with hyperseborrhoea, which usually causes the episodes of acne so typical of adolescence.
Many teenagers therefore find themselves having to deal with the issue of oily skin. Even when the blemishes have disappeared and things have calmed down as hormones begin to stabilise, some people go on suffering from oily skin in adulthood.
Oily skin is something that makes like difficult from a social point of view and has a significant influence on self-image.
As you grow older, sebum production starts to fall - gently, for men, once they reach their forties, but brutally for women on reaching the menopause. This is when a combination skin can develop, with some oily areas and others that are dry.