Many women with PCOS notice their face turns oily quickly, especially across the T-zone (forehead, nose, chin), and that pores look larger than they used to. Blotting the face several times a day barely helps, and by midday the skin is shiny again. This is not about “dirty” skin or lazy skincare. Oily skin and large pores in PCOS have a clear hormonal cause, and once you understand that cause, you can choose the right care instead of jumping from product to product.

Why androgens make skin oilier

The sebaceous (oil) glands in facial skin carry androgen receptors. When androgens such as testosterone rise, they are converted inside the skin into a stronger form, dihydrotestosterone (DHT), by the enzyme 5-alpha-reductase. It is this DHT that drives the oil glands to produce more sebum. In PCOS, androgens are often elevated, so the oil glands work harder and the skin becomes oilier than usual.

One important thing many people do not realise: your blood androgen levels do not have to be high for skin to be oily. Some women have higher 5-alpha-reductase activity within the skin glands themselves, so their skin reacts more strongly to androgens even when blood tests look normal. That is why a normal hormone panel does not rule out hormonally driven oily skin.

How pores come to look larger

Pores look bigger not because they “open” and then “close” the way marketing often suggests. What actually happens is that a pore filled with excess oil and dead skin cells stretches and becomes more visible. Sebum on PCOS skin also tends to be thicker and stickier, so it fills pores more easily. On top of that, oily skin reflects light differently, making texture and pores stand out more.

Other factors contribute too: long-term sun exposure and ageing reduce the collagen around pores, and frequent squeezing or harsh scrubbing makes things worse. The key thing to understand is that pore size is partly determined by genetics and cannot be fully erased. The realistic goal is to reduce excess oil and tidy the texture, not to seal pores completely. Promises of “permanently shrinking pores” on a product label deserve healthy scepticism.

Oily skin rarely arrives alone in PCOS. It is usually part of the wider picture of excess androgen, so you may notice it alongside hormonal acne on the chin and jaw, or increasing facial hair. Some women also find skin in folds such as the neck and underarms turning darker, a sign of acanthosis nigricans linked to insulin resistance.

Remember that oily skin alone does not diagnose PCOS. The international PCOS guideline (the 2023 Monash, ESHRE and ASRM guideline that Malaysia follows) requires at least two of three features: irregular periods, signs of excess androgen, and polycystic ovaries on a scan. If your oily skin appears alongside irregular periods or other androgen signs, that is a pattern worth checking. See the full list of PCOS symptoms for a more complete picture, and read what PCOS is if you are new to the condition.

Evidence-based skincare, not just what’s viral

Malaysia’s hot, humid climate genuinely adds to oiliness and sweat, so a light, consistent routine works better than many harsh products. A few approaches have real evidence behind them:

  • Niacinamide (vitamin B3). Studies show topical niacinamide at around 2 to 5 percent helps reduce oil production and improve the look of pores after roughly 12 weeks of regular use. It is also gentle and rarely irritating.
  • Topical retinoids. Retinoids speed up skin cell turnover and are among the best-evidenced ingredients for texture and pores. They need to be started slowly because they can dry and irritate at first, and they are not used during pregnancy.
  • A gentle cleanser twice daily. Over-washing or using a too-harsh cleanser can make skin produce more oil in response. Twice a day with a suitable cleanser is enough.
  • Non-comedogenic moisturiser and sunscreen. Oily skin still needs a light moisturiser, and sunscreen matters because it protects the collagen that supports your pores.

If the main driver is high androgen, topical skincare alone may not be enough. In that case a doctor may discuss androgen-directed treatment such as a combined contraceptive pill or spironolactone, especially if the oily skin comes with bothersome acne. These decisions are made with a doctor because such medicines are prescription-only and are not suitable while trying to conceive or pregnant.

Supplements: what’s real and what’s overstated

Many supplements are marketed for “PCOS skin,” so it is important to be honest about the evidence. N-acetylcysteine (NAC) is often mentioned. The dose used in PCOS studies is around 1.8 grams a day, and NAC shows benefit for some metabolic, androgen and fertility outcomes. But specifically for oily skin and acne, the evidence is limited, and a large systematic review found no clear difference between NAC and placebo for acne. So treat NAC as possible metabolic support, not a proven skin medicine.

Because PCOS often involves insulin resistance, improving insulin sensitivity through diet and movement can help lower androgens at the source, which may indirectly help the skin. If you want to try any supplement, check halal status and NPRA registration first, tell your doctor if you take other medicines, and avoid it without advice if you are pregnant or breastfeeding.

When to see a doctor

Oily skin is not an emergency, but there is a point to stop trying products on your own and see a doctor. Consider an appointment if oily skin comes with deep or scarring acne, infrequent or absent periods, increasing facial hair, or if months of skincare have not helped at all. A voice that suddenly turns deep should be checked more promptly.

In Malaysia, you can start at a KKM Klinik Kesihatan for around RM1 for citizens, and the medical officer can refer you to a dermatology, gynaecology or endocrine clinic if needed. Private clinics offer faster access but costs vary. If the oily skin is treated as a possible sign of PCOS, the doctor may suggest hormone blood tests and a scan. For women who are unmarried or have no history of intercourse, a transabdominal scan is the usual first choice in Malaysia, and PCOS can still be diagnosed without a transvaginal scan.

If you have just been diagnosed, our newly diagnosed PCOS guide walks through the first steps calmly. Oily skin and large pores can be managed well, and they are not a failure of your skincare. They are a hormonal issue with real solutions.