Hair thinning with PCOS
If you have polycystic ovary syndrome, thinning hair at the top of your head is a recognised symptom, and it’s talked about far less than periods or acne. It usually shows up as a widening parting, a see-through crown, or a ponytail that’s got thinner over a year or two. Unlike shedding after a baby, this one doesn’t stop on its own.
The NHS now calls PCOS polyendocrine metabolic ovarian syndrome (PMOS). We use PCOS here because it’s still the name most people search for.
Why it happens
PCOS raises androgen levels — the hormones that in higher amounts shrink hair follicles on the scalp. Each hair grows back finer and shorter until some follicles stop producing visible hair at all. Doctors call it androgenic alopecia or female pattern hair loss. The same hormones are why PCOS can cause acne, and extra hair on the face or body while the hair on your head gets thinner.
What it looks like
Gradual, not sudden. Thinning at the crown and along the parting, while the hairline at the front usually stays put. No bald patches, just less density. It often runs alongside irregular periods, weight that’s hard to shift, or skin changes.
What actually helps
Because the cause is hormonal, the fixes are too — and they come from a GP or dermatologist, not a shampoo. A doctor may suggest anti-androgen medicines such as spironolactone, which aren’t licensed for scalp hair loss in the UK. The combined pill is used for other symptoms such as irregular periods. Diet, exercise and medicines such as metformin are used for other symptoms, but the sources don’t say they treat thinning hair directly. Ask for blood tests to check androgen levels, thyroid and iron, because iron deficiency and thyroid problems can also cause shedding. Minoxidil should be avoided if you’re planning a pregnancy or breastfeeding, and spironolactone should be avoided in pregnancy and breastfeeding. Ask your GP or pharmacist.
Why tracking matters
PCOS hair loss moves slowly, and so do the treatments. Minoxidil usually takes at least 6 months to judge. Without a record, you can’t tell if the pill is working, if minoxidil is doing anything, or if it’s quietly getting worse. One photo of your crown and parting each month, same light, same angle, is the only honest answer. It also gets you taken seriously — because “it feels thinner” gets dismissed and twelve months of photos doesn’t.