Hormonal acne in Singapore why adult acne flares along the jaw, and what actually helps

The basics

What hormonal acne is, and why adults get it

Acne starts in the hair follicle and its oil gland. Androgens, hormones present in both women and men that rise at puberty, make oil glands larger and more active. Extra sebum, skin cells that clog the pore, the acne bacterium C. acnes and inflammation then combine to make spots. In that sense all acne is hormonal; the term is used when hormones are the most obvious driver.

Adult acne is common, especially in women. Some women who had clear skin as teenagers develop acne in their twenties, thirties or forties, and others never quite grow out of it. Acne does not usually mean a hormone disorder: the 2023 international PCOS guideline notes that acne on its own is a relatively weak predictor of raised androgen levels.

Men get adult acne too. In men, sudden or severe acne after starting testosterone, anabolic steroids or some bodybuilding supplements is worth mentioning to a doctor.

The pattern

Jawline, chin and premenstrual flares: the hormonal pattern

The picture most people mean by hormonal acne is deep, tender red bumps on the lower face, jawline, chin and neck, often slow to come to a head and leaving dark marks behind. In a survey of 400 women and girls aged 12 to 52, 44% said their acne flared before their period, and premenstrual flares were more common in women over 33.

The pattern is not as specific as social media suggests. In an international study of 374 women aged 25 and over seen for acne, 89.8% had acne in several facial zones, such as the cheeks, forehead, jaw and temples, 93.7% had blackheads or whiteheads, and almost half had acne on the chest or back too. Only 11.2% had acne on the jaw alone; that group reported more daily stress and was more often prescribed an anti-androgen.

So a jawline flare before your period suggests hormones are involved, but it does not change the basics. The study's authors recommended treating adult acne with agents that target every type of spot, and noted that many adult women respond well to standard first-line treatment. Hormonal treatment can then be added when it suits you.

Triggers

What makes adult and hormonal acne flare

Flares usually have more than one cause. These are the triggers doctors ask about most often.

Diet is still debated. Some studies link high-sugar diets and milk with acne, but the evidence is mixed, so doctors usually start with treatments that have stronger evidence.

• The menstrual cycle, with flares in the week or so before a period.
• Starting, stopping or switching hormonal contraception; some progestogen-only methods can worsen acne in some people.
• Pregnancy and the months after giving birth.
• Polycystic ovary syndrome (PCOS) and, rarely, other hormone disorders.
• Stress and short sleep, which often arrive together.
• Heavy, occlusive skincare, make-up and hair products, and friction from masks, phones or resting your chin on your hand.
• Some medicines, such as steroid tablets, testosterone and anabolic steroids.
• Picking and squeezing, which push inflammation deeper and leave marks.

PCOS

Is it PCOS? Signs that need a doctor's check

Polycystic ovary syndrome (PCOS) is a common hormonal condition. Under the 2023 international guideline it is diagnosed when two of three features are present, after other causes are excluded: signs or blood tests showing high androgens, irregular or absent ovulation, and polycystic ovaries on ultrasound, for which a raised anti-Müllerian hormone (AMH) level can now substitute in adults.

Acne alone is not a reliable sign. The guideline describes acne without excess hair growth as a relatively weak predictor of raised androgens, so it is the combination of features that matters. See a GP, gynaecologist or endocrinologist if you have acne with any of the following.

PCOS also affects metabolic and heart health, which is why it is worth diagnosing properly rather than treating the skin alone. Rapidly worsening acne with fast-growing body hair or a deepening voice needs prompt medical review.

• Periods less than 21 or more than 35 days apart, fewer than eight a year, or absent.
• Coarse, dark hair growing on the face, chest or abdomen.
• Thinning hair on the scalp.
• Weight gain that is hard to shift, or dark, velvety skin on the neck or in the armpits.
• Difficulty getting pregnant.
• Acne that is sudden, severe or not responding to usual treatment.

Treatment options

Hormonal acne treatment options, by generic name

The 2024 American Academy of Dermatology guideline gives strong recommendations to benzoyl peroxide, topical retinoids, topical antibiotics and oral doxycycline; strongly recommends isotretinoin for acne that is severe, scarring, distressing or not responding to standard treatment; and makes conditional recommendations for clascoterone, the combined pill and spironolactone. In Singapore, the pill, spironolactone, clascoterone, oral antibiotics and isotretinoin are prescription-only medicines.

Most plans combine a topical routine with one oral treatment if needed, and are judged over about three months. Hormonal treatments are slow: in the spironolactone trial described below, the difference from placebo was larger at 24 weeks than at 12.

The pill and spironolactone

The combined pill and spironolactone: what the trials show

Combined oral contraceptive pills contain an oestrogen and a progestogen. A Cochrane review of 31 trials with 12,579 participants found that the pills tested against placebo reduced both inflamed and non-inflamed facial acne, with few consistent differences between pill types, although pills containing cyproterone acetate or chlormadinone acetate did better than levonorgestrel in head-to-head trials. How the pill compares with other acne treatments is still unclear.

Spironolactone is an older tablet, developed for blood pressure and fluid retention, that blocks the effect of androgens. In the SAFA trial of 410 women in England and Wales, it improved acne-related quality of life compared with placebo, and at 24 weeks 82% vs 63% reported that their acne had improved. Headaches were more common (20% vs 12%) and no serious adverse reactions were reported; the authors called it a useful alternative to oral antibiotics for women.

Both need a doctor. The pill is not suitable for people with certain blood clot, migraine or blood pressure risks, or for smokers over 35; spironolactone is not used for acne in men and must not be taken in pregnancy. A doctor can advise whether either suits you.

Isotretinoin

When isotretinoin is the right call

Hormonal-pattern acne is not a reason to rule out isotretinoin. For acne that is severe, scarring, causing distress or not responding to other treatment, the AAD guideline strongly recommends it, whether or not hormones seem to be involved. Many people have long remissions after a course, though some relapse and need further treatment.

It needs careful supervision. It can seriously harm an unborn baby, so pregnancy must be avoided during treatment and for a period afterwards, as the doctor directs, and dry lips and skin are almost universal. Waxing, exfoliating facials, peels and laser are postponed during treatment and for a time afterwards.

Stress and sleep

Stress, sleep and hormonal acne

Stress does not cause acne on its own, but it can make it worse. In a study of 22 university students, acne was more severe during exams than outside them, and the rise in severity tracked the rise in perceived stress (a correlation of 0.61), even after allowing for changes in sleep and diet.

Sleep is harder to study separately, because short sleep, late nights and stress tend to arrive together. Regular sleep, not picking during stressful weeks and keeping your routine simple rather than piling on new products are sensible, low-cost steps, but they support treatment rather than replace it.

Be wary of supplements and detox products sold for hormonal acne. Few have good evidence, and some can interact with medicines, so ask a doctor or pharmacist first.

Facials

What facials can and cannot do for hormonal acne

Facials work on the surface. HydraFacial Syndeo uses a mild glycolic and salicylic acid step and vortex suction to lift out blackheads and congestion, which helps with the comedones most adult women have alongside their red spots. SKINLDM, an ultrasound micro-massage facial, is designed for skin that feels hot, red or sore during a flare, and can be done while skin is inflamed, when extraction has to wait.

What a facial cannot do is lower androgen levels, reduce oil gland activity or reach deep lumps along the jaw. Deep, painful spots should not be extracted, because squeezing pushes inflammation deeper and raises the risk of marks and scars. If your acne is deep, scarring or not improving, see a doctor first and use facials as support.

Where to go

Hormonal acne care in our network

At IN Eternity Clinic, 9 Scotts Road, #12-01 Pacific Plaza, beside Orchard MRT, Dr Sin Yong examines the type and severity of the acne, rules out look-alikes such as fungal acne, rosacea and perioral dermatitis, and plans prescription creams or gels, oral medication or hormonal treatment where suitable, reviewing the plan at follow-up visits. Once breakouts are under control he can assess marks and scars as a separate step. Treatment is priced at consultation by the clinic; WhatsApp +65 8815 3008.

SkinRev Lab, at #B1-28 CityLink Mall, linked underground to City Hall and Esplanade MRT, does not prescribe or inject. HydraFacial Syndeo (S$288, S$388 or S$438 before GST; first-timer rate at the counter) and SKINLDM (S$288 with a basic facial, first visit S$68, before GST) can support your skin alongside a doctor's plan. If PCOS is suspected, your GP or a gynaecologist is a sensible first stop.

Sources

References & sources

1. Reynolds RV, Yeung H, Cheng CE, et al. Guidelines of care for the management of acne vulgaris. J Am Acad Dermatol. 2024;90(5):1006.e1-1006.e30.
2. Stoll S, Shalita AR, Webster GF, Kaplan R, Danesh S, Penstein A. The effect of the menstrual cycle on acne. J Am Acad Dermatol. 2001;45(6):957-960.
3. Dréno B, Thiboutot D, Layton AM, Berson D, Perez M, Kang S. Large-scale international study enhances understanding of an emerging acne population: adult females. J Eur Acad Dermatol Venereol. 2015;29(6):1096-1106.
4. Teede HJ, Tay CT, Laven JJE, et al. Recommendations from the 2023 international evidence-based guideline for the assessment and management of polycystic ovary syndrome. J Clin Endocrinol Metab. 2023;108(10):2447-2469.
5. Arowojolu AO, Gallo MF, Lopez LM, Grimes DA. Combined oral contraceptive pills for treatment of acne. Cochrane Database Syst Rev. 2012;(7):CD004425.
6. Santer M, Lawrence M, Renz S, et al. Effectiveness of spironolactone for women with acne vulgaris (SAFA) in England and Wales: pragmatic, multicentre, phase 3, double blind, randomised controlled trial. BMJ. 2023;381:e074349.
7. Chiu A, Chon SY, Kimball AB. The response of skin disease to stress: changes in the severity of acne vulgaris as affected by examination stress. Arch Dermatol. 2003;139(7):897-900.

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