“I Thought I’d Grown Out of It”: The Truth About Hormonal Acne

By Yvonne McNamara, Registered Nurse, Renew Skincare & Aesthetics Clinic, Gort, Co. Galway

You were promised that acne would be over by twenty. Yet here you are at 28, 34 or 45, standing in front of the bathroom mirror, studying a deep, tender spot on your chin that seems to arrive on schedule every month.

If that sounds familiar, you are far from alone. Adult acne is one of the most common - and most emotionally draining - skin concerns women bring to clinics like mine. And almost every woman tells me a version of the same story.

The frustration is real

“I’ve tried every product and nothing works.”

“I thought it was all finished when I became an adult.”

By the time many women reach me, they have worked their way through the pharmacy shelves, the cleansers, the spot treatments and the TikTok-recommended serums. Many have also been through medical interventions: courses of antibiotics, laser, chemical peels and microneedling. Some of these helped for a while. Some did nothing. Many produced a clear patch of skin, only for the breakouts to return a few months later.

There is also a quiet sense of embarrassment that rarely gets spoken aloud. Adults are not supposed to have spots, so women assume they must be doing something wrong - washing too little, washing too much, eating badly, stressing too much. It is an exhausting cycle of self-blame, and it is largely undeserved.

Why acne doesn’t end at eighteen

Your skin keeps responding to your hormones throughout adulthood. Acne develops through four overlapping processes: increased oil (sebum) production, blocked hair follicles, changes in skin bacteria, and inflammation. Hormones can influence several of these, particularly how much oil your skin produces and how easily your follicles become inflamed.

The key players are androgens, a group of hormones that includes testosterone. Despite its reputation as a “male” hormone, testosterone is present in everyone, and it stimulates the oil-producing glands in the skin.

Crucially, hormonal acne does not necessarily mean you have too much testosterone. Your levels can sit comfortably within the normal range while your skin remains unusually sensitive to their effects.

Your 20s, 30s and 40s

In your 20s, hormones fluctuate across the menstrual cycle, and breakouts often cluster in the days before a period. Starting or stopping hormonal contraception can change the skin noticeably. Some women carry teenage acne into adulthood, while others develop it for the first time.

In your 30s, acne is influenced by a mix of factors - genetics, stress, medications, skincare products and sensitivity to androgens. Pregnancy, the postnatal period and changes in contraception can all play a part. If breakouts come with irregular periods, increased facial hair or thinning scalp hair, it is worth asking your GP whether an underlying condition such as polycystic ovary syndrome (PCOS) should be investigated.

(Polycystic ovary syndrome (PCOS) was officially renamed Polyendocrine Metabolic Ovarian Syndrome (PMOS) on May 12, 2026

In your 40s, perimenopause brings fluctuating oestrogen and progesterone, with oestrogen eventually declining. The relative influence of androgens can increase, and some women find themselves dealing with breakouts and dry, sensitive skin at the same time. That said, not every spot in your 40s is hormonal, and new or rapidly worsening acne deserves proper assessment.

“But my blood tests were normal”

This is perhaps the most common source of confusion, and the most disheartening. A woman is told her bloods are fine, and so she is left wondering whether the problem is all in her head.

It is not. The amount of a hormone in your bloodstream is not the same as the effect that hormone has on your skin. There are several reasons for this:

• Skin sensitivity varies. The oil glands have androgen receptors, and in some people they respond more strongly to perfectly normal hormone levels.
• Skin makes its own hormones. It can convert hormone precursors into more active androgens locally, and a blood test cannot measure what is happening inside an individual follicle.
• A blood test is a snapshot. It captures a single moment, not the fluctuations across a cycle or over several weeks.
• Balance matters. Oestrogens, androgens and the proteins that bind them all shape the overall picture, and a single result cannot show how much hormone is actually available to act on the skin.

Think of it this way: two women can have identical amounts of hormone circulating in their blood, yet one woman’s skin may react far more strongly than the other’s.

Blood tests still have a role, particularly when a GP suspects an underlying endocrine condition. Depending on your symptoms, they may check testosterone, sex hormone-binding globulin (SHBG), DHEAS, thyroid function or prolactin. But a normal panel does not prove hormones play no part in your acne - and equally, not all adult acne is hormonal.

What to look for

Certain clues may point towards a hormonal influence: breakouts around the chin, jawline and lower cheeks; deep, tender spots that return to the same areas; flares in the days before a period; and acne that persists into adulthood or begins later in life. These are clues, not a diagnosis. Rosacea and folliculitis can look very similar, which is why a proper assessment matters.

What can you do?

• Track your skin. Note where and when breakouts occur, and whether they relate to your cycle, contraception or stressful periods.
• Protect your barrier. Gentle cleansing, a suitable moisturiser and daily SPF are far more useful than stripping the skin with harsh products.
• Seek a professional assessment. Persistent, painful, scarring or distressing acne should be reviewed by an expert. Evidence-based options include topical retinoids, benzoyl peroxide and azelaic acid, and for some patients, hormonal or other medical treatments.
• Don’t ignore red flags. Irregular or absent periods, excess facial hair, scalp hair thinning or sudden severe acne warrant prompt medical review.

Stress, sleep, diet, excessive whey protein intake and skincare products can all contribute, but it is important not to blame yourself. Acne has many interacting causes, and some women simply need medical treatment alongside a well-planned skin routine.

The bottom line

Hormonal acne is not a failure of willpower, hygiene or product choice. It is the result of a complex relationship between your hormones, your skin’s sensitivity to them, and the way your follicles respond. Understanding your individual pattern - alongside your medical history - is often far more revealing than any single blood result.

If you have been told it is “just spots”, or that you should have grown out of it by now, please know that your frustration is valid. Persistent acne is a genuine medical and emotional concern, and it deserves a thoughtful, individualised approach.

This article is for educational purposes and does not replace individual clinical assessment. Sources include American Academy of Dermatology acne guidelines, Endocrine Society literature on androgen excess, and HSE & NHS guidance on acne.