Puberty is not acne, why at maturity back acne?

According to dermatology experts, are the main reasons for acne can appear at the age of 30-40 or 50 is:
– Change the urban diet, activity, status, stress prolonged stress
– Hormonal disorders (period, pregnancy or menopause)
– Taking birth control pills
– Irritation with cosmetics
– The underlying pathology such as polycystic ovaries, adrenal tumors...
Mature women often suffer from acne more often than men because acne is related to hormones (hóoc) and female hormones often fluctuating throughout life, while male hormone stability, the