Even though hormonal acne is the result of the action of male sex hormones (androgens), it more specifically refers to adult female acne. While after puberty, hormone levels stabilise in men, they still fluctuate in women. Indeed, although this skin issue affects up to 40% of adults from the age of 25, 75 to 80% of women between 25 and 40 years old are particularly prone to this type of acne.
It is characterised by the appearance of various types of spots on the face at specific times, particularly during the menstrual cycle (before or during menstruation), during pregnancy, sometimes at menopause or even during periods of stress. This term is thus less commonly used in men, as they do not undergo numerous hormonal changes throughout their lives.
How can I tell if I have hormonal acne?
You may be suffering from hormonal type acne:
If spots are concentrated on the lower area of the face, around the jawline, chin and neck;
If you are experiencing skin imperfections such as red spots (papules), white spots (pustules), nodules or painful micro-cysts , caused by skin inflammation.
If outbreaks of spots occur cyclically or following a known hormonal disturbance, that is, skin eruptions trigger or intensify during the premenstrual phase and menstruation, unlike juvenile acne which disappears once puberty is over. It can also occur during specific events, such as pregnancy, menopause or when stopping contraceptive pills.
Why do I have hormonal acne?
Acne flare-ups can be linked to several factors, including hormonal fluctuations. Indeed, changes in the production of certain hormones stimulate the sebaceous glands to produce an excess amount of sebum (seborrhoea). This skin imbalance creates an ideal environment for the growth of Propionibacterium acnes, which causes inflammation of the pilosebaceous follicle and the surrounding dermis.
An excess of androgen hormones circulating in the blood, male sex hormones of which the main ones are testosterone and dihydrotestosterone (DHT), plays a significant role in the onset of hormonal acne. Indeed, these are the primary hormones that control the activity of the sebaceous glands across the entire skin surface. In women, androgens are secreted in small doses physiologically. However, in certain situations, the production of androgen is excessive:
Stopping the contraceptive pill: Some categories of oral contraceptives are sometimes used to improve acne, as they help to reduce acne flare-ups. This includes oestrogen-progestogen (or combined pills) which block ovulation by substituting the hormones naturally produced by the body. In the absence of ovulation, the production of androgen hormones decreases, in addition to counterbalancing the acne-boosting effect of progesterone. With the cessation of the pill, the secretion of testosterone in the body resumes on a large scale, accompanied by a surge of hormonal acne a few weeks to a few months after stopping contraception.
Note : Other progestin-type contraceptives can, on the other hand, increase testosterone levels and consequently promote acne.
Menstrual Cycle: If there is a time when skin eruptions are particularly intense, it is just before the onset of menstruation or even during it, a time when the levels of oestrogen and progesterone are at their lowest while testosterone, although in small amounts, reaches a level higher than the feminising hormones. Indeed, oestrogen is known to prevent the production of sebum when produced in sufficient doses, by directly opposing testosterone or inhibiting its secretion. Present in small quantities, oestrogen and progesterone cannot exert their "anti-sebum" effect.
Pregnancy: Pregnancy is another time when women experience a real hormonal upheaval. Indeed, the levels of oestrogen and progesterone increase significantly. These can lead to hyperactivity of the sebaceous glands and therefore an overproduction of sebum. It is especially during the first trimester that women are more prone to developing hormonal acne.
Menopause: This physiological phenomenon is characterised by a significant hormonal upheaval. It occurs following a gradual and drastic decline in the synthesis of the two reproductive hormones: oestrogen and progesterone, as the ovaries cease to produce them. Conversely, during menopause, the level of testosterone tends to increase and takes precedence over the female hormones. However, this rise in male hormones is the cause of acne development in some individuals.
Period of stress: Stress plays a fundamental role in the balance of hormones, and therefore in the amplification and frequency of acne outbreaks. Indeed, during periods of stress, cortisol is secreted in large quantities. This hormone impacts the skin by stimulating the adrenal glands, which are responsible for the production of androgen hormones. These hormones, in turn, regulate the production of sebum by the sebaceous glands.
Hormonal acne can also result from a genetic predisposition. Indeed, the number, size and activity of the sebaceous glands can be inherited. While the number of sebaceous glands remains stable throughout life, their size increases with age. A hypersensitivity of the sebaceous glands can also be a cause.