Your family tree
While the exact genetic cause of acne is still foggy, research shows that if your
family has had a case of severe acne, it's more likely you'll have severe acne.
(Thanks, Mom and Dad!).
Consider puberty the master of ceremonies for the acne party. During puberty, your body begins to produce hormones called androgens.
THE STRESS METER
Stress doesn't directly cause acne, but it does act as a trigger for excess oil development.
Not only does stress throw your adrenal glands into overdrive, it also causes increased blood flow and expansion of capillaries, which makes skin appear more red and inflamed.
If that wasn't enough, stress can also cause poor absorption of nutrients and can slow healing because of a lowered immune system.