Most people do not suffer from oily skin until puberty. Why. Our endocrine system usually does not start to manufacture the hormones responsible increased sebum production until puberty. Even after puberty, hormone fluctuation affects our sebaceous glands. Women may notice that their skin will fluctuate during their cycle because of the changing hormone levels. Birth control pills or pregnancy also affect hormonal levels for similar reasons.
Genetics influences almost every aspect of our lives. Nearly all of our physical traits, from stature, to intellect, and even our skin are partially controlled by our genes. It is an unfortunate truth that some of us will just be more likely to have oily skin due to genetics. So, if you find that your mother or father has shiny skin in old family photos, you are probably also predisposed to oily skin.
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