Do Hormones Cause Acne? What UK Doctors Actually Look For

Do hormones cause acne? Yes, in large part. Androgens rise during puberty and make the skin’s oil glands bigger and more active, which is how acne begins. But most people with hormonal acne have hormone levels in the normal range, so UK guidance does not recommend hormone testing for everyone with acne.

That last point changes what you do next. This guide covers when hormone testing is worth asking about, and what a UK doctor does with the answer.

On this page: How hormones drive acne · Why normal hormones still cause acne · When testing is indicated · Hormonal triggers beyond puberty · The UK pathway · What to ask your doctor · FAQs

Do hormones cause acne directly, or just make it more likely?

Androgens are a group of hormones present in everyone, testosterone being the best known. During puberty, androgen levels rise and enlarge the sebaceous glands, the oil glands attached to hair follicles. Those glands then produce more sebum, the oil that lubricates skin and hair. Sebum mixing with dead skin cells can plug a follicle, and a spot forms.

The NHS links acne to hormonal changes during puberty, and notes that acne runs in families, which is why two people with similar hormone levels can have very different skin. The acne concern page sets out the full mechanism.

So hormones are necessary for acne but not sufficient alone. Genetics, skin barrier function and inflammation all shape whether that hormonal signal produces spots.

Why “hormonal acne” usually does not mean abnormal hormones

Do hormones cause acne by being abnormal? Usually not, and that is the part missing from most articles on this subject.

Studies measuring blood androgen levels in women with acne have often found them sitting within the normal range. A cross-sectional study of 70 Nigerian women with acne and 70 without found no statistically significant difference in serum testosterone between the two groups, and no relationship between androgen levels and acne severity. The authors still recommended checking androgen levels in severe or treatment-resistant cases, which is a narrower recommendation than testing everyone.

The working explanation among dermatologists is that acne reflects how sensitive the sebaceous glands are to ordinary androgen levels, rather than how high those levels are. That is a hypothesis with reasonable support rather than settled fact.

The practical consequence is straightforward. A normal hormone blood test does not mean your acne is not hormonal. It usually means your hormones are behaving normally and your skin is responding strongly, which is the common picture.

When hormone testing is actually indicated

UK clinical guidance treats endocrine investigation as the exception rather than the rule. Most people with acne need no blood tests at all.

Writing in the Royal Pharmaceutical Society’s Pharmaceutical Journal, UK authors note that acne is usually diagnosed from skin examination alone and rarely requires additional investigation, but that an endocrine disorder such as hyperandrogenism should be investigated where suspected. Hyperandrogenism means higher-than-usual levels of male-type hormones.

The signs that shift the balance towards testing are specific.

Sign	Why it matters	What it may point to
Irregular, infrequent or absent periods	Menstrual disruption alongside acne suggests a hormonal driver rather than skin sensitivity alone	Polycystic ovary syndrome (PCOS) or another endocrine condition
Excess hair growth in a male pattern (hirsutism)	One of the recognised outward signs of higher androgen levels	Hyperandrogenism
Hair thinning at the scalp in a male pattern	Another recognised androgen-related sign	Hyperandrogenism
Acne starting for the first time after 25	Late-onset acne is less common and prompts a closer look at causes	Underlying endocrine cause worth excluding
Sudden severe acne, or acne that resists treatment	Named in UK guidance as a trigger for investigating endocrine causes	Hyperandrogenism or a drug cause
Taking anabolic steroids or testosterone	NICE NG198 specifically names self-administered anabolic steroids as a possible contributor	A drug cause rather than a disorder

If none of those apply, a UK GP is unlikely to order hormone tests, and that is consistent with guidance rather than a brush-off.

Hormonal triggers beyond puberty

Several hormonal situations affect acne in adults, and they are worth naming separately.

The menstrual cycle. Premenstrual acne flares are commonly reported. One Pharmaceutical Journal review puts the figure at around 60% of women with acne, though flare reporting relies on self-observation, so treat that as an approximation rather than a precise rate.

Contraception. NICE guideline NG198 advises that if someone receiving acne treatment wants hormonal contraception, the combined oral contraceptive pill should be considered in preference to the progestogen-only pill. Progestogen-only contraception is recognised as a possible acne trigger for some people.

PCOS. NICE sets out specific management for people with acne and polycystic ovary syndrome, and advises considering referral to an appropriate specialist, such as a reproductive endocrinologist, for those with additional features of hyperandrogenism.

Medication and hormone therapy. NICE advises considering condition-specific management or specialist referral if a medical disorder or medication is likely to be contributing. Acne is a recognised effect of testosterone used in gender-affirming hormone therapy, and of corticosteroids given by any route.

Pregnancy and perimenopause. Both involve substantial hormonal shifts, and acne can improve or worsen in either. The evidence is largely observational, and there is no reliable way to predict which direction an individual will go.

Hormonal acne and the UK system

Three things shape how this plays out with a UK GP.

• You are unlikely to be tested without a specific sign. UK guidance frames endocrine investigation as appropriate when hyperandrogenism is suspected, not as routine. If you have a relevant sign, say it explicitly at the appointment rather than assuming it will be asked about.
• A suspected endocrine cause goes to endocrinology, not dermatology. NHS formulary guidance based on NICE NG198 and NICE Clinical Knowledge Summaries states that patients presenting with acne with a suspected endocrinological cause should be referred to an endocrinologist rather than a dermatologist. Knowing which door you are aiming for saves time.
• Then there is the wait. The NHS standard is a maximum 18-week wait from referral to the start of consultant-led treatment. Waits vary widely by trust and specialty, and the standard is not currently met nationally.

A word on private hormone panels. Direct-to-consumer testing kits marketed for hormonal acne typically measure a broad panel of hormones. Because most people with acne have normal levels, a normal result is the likely outcome and tells you little you did not already know. An abnormal result still needs a doctor to interpret it in context. If you want testing, asking a GMC-registered GP whether it is clinically indicated is a more useful starting point than buying a panel and working backwards.

Acne timing is also informative here, since first-time acne after 25 is one of the signs that prompts a closer look. That pattern is covered in the guide to what age acne usually starts.

If you want detail on self-funded treatment options and what each involves, that sits on Revitalize in Turkey rather than on this site.

What to ask your doctor

Worth asking a GMC-registered doctor:

1. Based on my history, is there anything that makes you suspect a hormonal cause beyond ordinary puberty or cycle effects?
2. Are my periods, hair growth or hair thinning patterns relevant here, and have you factored them in?
3. If you are not testing my hormones, what would change your mind?
4. Could my current contraception be contributing, and is switching worth considering?
5. If a hormonal cause is suspected, would you refer me to endocrinology or dermatology, and why?
6. What would a normal hormone result actually rule out in my case?

Frequently asked questions