Adult Acne: Causes & Treatment

 Acne isn't just a teenage problem. Many adults are surprised — and frustrated — to find themselves dealing with breakouts in their 20s, 30s, 40s and beyond. Adult acne is common, it's not a sign of poor hygiene, and importantly, it responds well to the right treatment.

This guide explains what causes adult acne, how it differs from teenage acne, when to see a dermatologist, and the treatment options available today.

Adult acne refers to acne that continues past the teenage years or appears for the first time in adulthood, usually defined as after the age of 25. It's more common in women than men, and studies suggest it affects a significant proportion of adult women at some point.

There are two broad patterns:

• Persistent acne — acne that started in the teenage years and simply never fully resolved.
• Late-onset acne — acne that appears for the first time in adulthood, sometimes after years of clear skin.

Both are treatable, but they can behave differently to teenage acne, which is why an approach designed for adult skin matters.

While teenage acne often affects the forehead, nose and cheeks with a mix of blackheads, whiteheads and pimples, adult acne — particularly in women — tends to concentrate along the lower face, jawline, chin and neck. Breakouts are frequently deeper, more inflamed papules and nodules rather than surface blackheads, and they can be tender and slow to clear.

Adult skin is also often drier and more sensitive than teenage skin, so harsh anti-acne products marketed for teenagers can cause irritation and actually make things worse.

Acne develops when oil (sebum), dead skin cells and bacteria block the hair follicles, triggering inflammation. In adults, several factors commonly contribute:

• Hormones. Fluctuating androgen activity stimulates the oil glands. This is why many women notice breakouts flaring in the days before their period, during pregnancy, or around perimenopause. Conditions such as polycystic ovary syndrome (PCOS) can also play a role.
• Genetics. A family history of acne makes adult acne more likely.
• Stress. Stress hormones can worsen inflammation and oil production, which is why acne often flares during demanding periods.
• Skincare and cosmetics. Rich creams, hair products and some makeup can block pores. Over-washing, scrubbing and picking can also aggravate acne.
• Medications. Certain medications — including some corticosteroids, hormonal treatments and others — can trigger or worsen breakouts.
• Diet. Evidence is still evolving, but high-glycaemic (high-sugar) diets and, in some people, dairy may contribute for certain individuals according to some studies.

It's worth clearing up a common myth: acne is not caused by being unclean. Aggressive washing tends to irritate the skin rather than help.

It's worth seeking specialist advice if:

• Over-the-counter products haven't worked after a couple of months
• Your acne is deep, painful or cystic
• You're starting to see scarring or dark marks
• Your acne is affecting your confidence, mood or quality of life
• You have signs of a possible hormonal cause (such as irregular periods, excess hair growth, or sudden onset in adulthood)

Treating acne early is the single best way to prevent permanent scarring — which is far harder to treat than the acne itself. A dermatologist can confirm the diagnosis, look for any underlying causes, and tailor a treatment plan to your skin.

Adult acne can usually be improved with treatment. The most suitable approach depends on the type and severity of your acne, your skin type and your individual circumstances, so a treatment plan is tailored to you. Options your dermatologist may discuss include:

• Topical treatments applied to the skin — some available over the counter and others on prescription — often used in combination.
• Oral medications for more widespread or inflammatory acne, prescribed and monitored by your doctor.
• Hormonal therapies, which may help some women with hormonally driven acne. These require medical assessment and ongoing monitoring and are not suitable for everyone, including during pregnancy.
• Prescription treatments for severe, scarring or persistent acne that hasn't responded to other options. These require specialist supervision and careful monitoring, and some are not suitable during pregnancy.
• Procedures to improve the appearance of scarring and pigmentation, once active acne is controlled.

There's no single right treatment for everyone. The goal is to find an approach that suits your skin and circumstances, guided by your dermatologist.

Alongside medical treatment, a simple routine helps:

• Use a gentle, non-foaming or low-irritation cleanser twice a day — avoid harsh scrubs.
• Choose products labelled non-comedogenic (won't block pores), including makeup and moisturiser.
• Don't over-treat. Layering multiple strong actives often irritates adult skin.
• Wear sunscreen daily. Some acne treatments increase sun sensitivity, and sun can worsen pigmentation from old breakouts.
• Resist picking or squeezing — it prolongs healing and increases scarring.
• Give any treatment time; most take 6–12 weeks to show meaningful improvement.

Why am I getting acne in my 30s and 40s when I never had it as a teenager?
Late-onset adult acne is common, especially in women, and is often driven by hormonal changes, stress and genetics. It's very treatable, and appearing later in life doesn't mean it's harder to clear.

Is adult acne hormonal?
Hormones are a major contributor for many adults, particularly women who notice flares around their menstrual cycle. However, acne is usually multifactorial. A dermatologist can assess whether hormonal treatment is likely to help you.

Will adult acne go away on its own?
It can fluctuate, but adult acne often persists for years without treatment — and untreated inflammatory acne carries a risk of permanent scarring. Effective treatment is available, so there's no need to wait it out.

Can I get acne treatment without coming into a clinic?
Yes. Many aspects of acne care can be managed through a telehealth video consultation, which is convenient if you live outside Sydney or have a busy schedule. A valid Medicare referral from your GP allows a rebate to apply.

Adult acne is common, and you don't have to live with it. As a Fellow of the Australasian College of Dermatologists, Dr Burcu Kim provides expert, evidence-based care for adult and hormonal acne — helping you clear your skin and protect it from scarring.

Appointments are available in Sydney and via telehealth video consultation Australia-wide, with a valid Medicare referral. Book an appointment online or ask your GP for a referral.