PCOS Acne: Why Polycystic Ovary Syndrome Causes Breakouts and How to Treat It

What Is PCOS?

Polycystic ovary syndrome is a common hormonal disorder affecting approximately 8–13% of women of reproductive age worldwide, though estimates vary by diagnostic criteria used.¹ In Singapore, studies suggest prevalence rates comparable to global figures, with many cases remaining undiagnosed.²

PCOS is characterised by at least two of the following three features (Rotterdam criteria):

• Irregular or absent menstrual cycles
• Elevated androgen levels (hyperandrogenism) or signs of it, such as acne and excess hair growth
• Polycystic ovaries on ultrasound

While "polycystic" is in the name, the cysts are not the defining feature — the hormonal dysregulation is. And that dysregulation is precisely why skin problems are so common.

Why Does PCOS Cause Acne?

The Androgen Connection

The primary driver of PCOS acne is androgen excess. Androgens — including testosterone and its more potent derivative, dihydrotestosterone (DHT) — stimulate the sebaceous glands in your skin to produce more sebum (oil). Excess sebum, combined with dead skin cells, clogs pores and creates the conditions in which Cutibacterium acnes bacteria thrive.³

In women with PCOS, androgen levels are often elevated due to increased production from both the ovaries and adrenal glands, compounded by reduced levels of sex hormone-binding globulin (SHBG). Lower SHBG means more free androgens circulating in the bloodstream — more available to bind to receptors in skin tissue.⁴

The Insulin Resistance Factor

Up to 70% of women with PCOS have some degree of insulin resistance, regardless of body weight.⁵ When cells don't respond effectively to insulin, the pancreas compensates by producing more of it. Elevated insulin — a state called hyperinsulinaemia — stimulates the ovaries to produce even more androgens, and also promotes IGF-1 (insulin-like growth factor 1), which further increases sebum production and skin cell proliferation.

This creates a reinforcing loop: insulin resistance worsens androgen excess, which worsens acne.

Inflammation

Chronic low-grade inflammation is another hallmark of PCOS. Inflammatory cytokines can directly activate sebaceous glands and exacerbate acne lesions, independent of androgen levels. Research suggests that even women with PCOS who don't have elevated androgens on paper may still experience acne due to heightened sensitivity of their skin receptors to normal androgen levels.⁶

What Does PCOS Acne Look Like?

PCOS acne has a characteristic pattern that distinguishes it from other forms:

Location: Primarily the lower face — jawline, chin, cheeks, and neck. This distribution reflects androgen-sensitive sebaceous gland density in these areas.

Lesion type: Tends toward deep, cystic, or nodular lesions rather than surface-level whiteheads. These are the breakouts that sit under the skin, hurt to touch, and often leave post-inflammatory hyperpigmentation (PIH) or scarring.

Timing: Often flares cyclically around menstruation, but unlike hormonal acne in women without PCOS, it rarely fully clears between cycles.

Treatment resistance: PCOS acne typically doesn't respond well to standard topical treatments alone, because the root cause is systemic rather than skin-deep.

Diagnosing the Hormonal Root Cause

If you suspect PCOS is driving your acne, a proper diagnosis requires blood tests, not just a skincare consultation. Key markers your doctor will look at include:

• Total and free testosterone
• DHEA-S (dehydroepiandrosterone sulphate)
• LH:FSH ratio
• Fasting insulin and glucose
• SHBG
• Prolactin and thyroid function (to rule out other causes)

A pelvic ultrasound may also be recommended. In Singapore, you can request a PCOS workup through a GP, gynaecologist, or endocrinologist. Accurate diagnosis is essential because PCOS acne requires a different treatment approach than acne caused by other factors.

Treatment Approaches for PCOS Acne

1. Hormonal Therapies (Prescribed)

Combined oral contraceptives (COCs): Pills containing an oestrogen-progestogen combination remain one of the most widely used treatments for PCOS acne. They increase SHBG production (lowering free androgens) and directly suppress ovarian androgen production. Pills containing anti-androgenic progestogens such as cyproterone acetate or drospirenone are particularly effective for acne.⁷

Spironolactone: An aldosterone antagonist with significant anti-androgenic properties. It blocks androgen receptors in skin tissue, reducing sebum and improving acne — particularly cystic jawline lesions. A 2015 retrospective study found meaningful acne improvement in women with PCOS treated with spironolactone.⁸

Metformin: An insulin-sensitising agent most commonly associated with diabetes management. In PCOS, metformin reduces hyperinsulinaemia, which indirectly lowers androgen production. While its effect on acne is more modest than anti-androgens, it's useful in women where insulin resistance is the dominant driver.⁹

2. Topical and Dermatological Treatments

Topical therapies work best as adjuncts to hormonal treatment, not stand-alone solutions for PCOS acne:

• Retinoids (tretinoin, adapalene): Normalise skin cell turnover, reduce comedone formation, and have some anti-inflammatory action.
• Benzoyl peroxide: Kills acne-causing bacteria. Useful as spot treatment.
• Azelaic acid: Has anti-inflammatory and mild androgen-inhibiting properties in skin tissue. Well-tolerated and helpful for PIH.
• Niacinamide: Reduces sebum production and calms redness. Good for daily maintenance.

3. Diet and Lifestyle

Given the insulin-androgen connection, dietary strategies that improve insulin sensitivity can meaningfully reduce PCOS acne:

• Low glycaemic index (GI) diet: Reduces insulin spikes. A systematic review found that low-GI diets improved hormonal markers in women with PCOS.¹⁰
• Reducing refined carbohydrates and sugar: Directly dampens insulin and IGF-1 levels.
• Inositol supplementation (myo-inositol and D-chiro-inositol): Shown in multiple RCTs to improve insulin sensitivity, reduce androgens, and in some studies, improve acne and skin in PCOS.¹¹
• Regular exercise: Increases insulin sensitivity independently of weight loss.
• Stress management: Cortisol from chronic stress stimulates adrenal androgen production, compounding PCOS symptoms.

4. Skincare Routine Principles

While no skincare routine will resolve the underlying hormonal cause, a thoughtful routine minimises damage and supports barrier health:

• Non-comedogenic, fragrance-free moisturiser: Counterintuitively, dehydrated skin overproduces oil.
• Gentle, pH-balanced cleanser: Over-stripping skin disrupts its microbiome and worsens inflammation.
• SPF daily: Essential if using retinoids, and important for preventing PIH from darkening.
• Avoid heavy, occlusive products: Especially around the jawline and chin.

When to Seek Help

PCOS acne is a medical condition, not a willpower problem. If breakouts are affecting your confidence, leaving scars, or not improving with standard skincare, it's worth seeing a doctor who can investigate the hormonal picture. A dermatologist and gynaecologist working together — or a GP with experience in PCOS — can create a more targeted plan.

In Singapore, several women's health clinics now offer comprehensive PCOS management that addresses skin, metabolic, and reproductive symptoms together.

Frequently Asked Questions

Q: Can PCOS acne be cured? PCOS itself is a chronic condition that can't be "cured," but its symptoms — including acne — can be effectively managed with the right combination of hormonal treatment, lifestyle changes, and skincare. Many women see significant and lasting improvement.

Q: Does losing weight help PCOS acne? For women with PCOS and excess weight, even modest weight loss (5–10% of body weight) has been shown to improve insulin sensitivity, reduce androgen levels, and improve acne. However, PCOS acne also affects women at normal or low body weight, for whom weight loss is not the primary lever.

Q: Why does my jawline keep breaking out even though I eat well and cleanse properly? Persistent jawline acne is a hallmark of androgen excess. If it's not responding to skincare, the cause is systemic (hormonal), not topical. A blood test to check your androgens and insulin is worth discussing with your doctor.

Q: Is PCOS acne the same as regular hormonal acne? Hormonal acne in women without PCOS typically flares around menstruation and clears between cycles. PCOS acne tends to be more persistent, more cystic, and more resistant to treatment — because the underlying hormonal imbalance doesn't resolve between cycles.

Q: How long does it take for PCOS acne treatment to work? Hormonal treatments (like the pill or spironolactone) typically take 3–6 months to show meaningful skin improvement. Retinoids and topical treatments may show results sooner, but won't address the root cause alone.

Q: Does the Zoey supplement help with PCOS acne? Zoey contains myo-inositol and D-chiro-inositol at a clinically researched 40:1 ratio — the ratio shown in studies to best support insulin sensitivity and hormonal balance in women with PCOS. If insulin resistance is a driver of your hormonal acne, inositol may support improvement over time alongside medical management.