Androgens are male sex hormones such as testosterone. They stimulate
the growth of hair and the sebaceous glands (oil glands in the skin)
by triggering androgen receptors found in the skin and hair.
Your ovaries have to make androgens in order to make female sex
hormones such as oestrogens.
If your ovaries make too many androgens or if your skin is very
sensitive to circulating androgen levels, you may find that you
suffer from a greasy skin.
This can lead to other problems such as pimples, excessive hair
growth or even hair loss.