PCOS, Painful Sex and Vaginal Dryness: Why Androgens Aren't the Cause

Does PCOS itself make sex painful, or is something else going on?

PCOS accounts for a measurable share of this picture, but not most of it. The largest meta-analysis of PCOS and sexual function — 40 studies pooled through the Female Sexual Function Index (FSFI) — found the pain domain scored 0.30 standard deviations lower in PCOS than in controls (95% CI −0.35 to −0.25), and the lubrication domain scored almost identically lower at −0.31 (95% CI −0.36 to −0.26) (Bachega et al., 2025).

That is real evidence, but it is worth naming what kind. The FSFI is a validated quality-of-life questionnaire completed by women already diagnosed with PCOS — not a study designed around dyspareunia as its own outcome. No trial has recruited specifically for painful sex in PCOS, tracked how it changes over time, or tested a PCOS-specific treatment against it. What exists is a secondary finding inside a broader sexual-function survey, which is a different kind of evidence than a dedicated dyspareunia trial would produce. The 2023 international guideline reflects the same gap: it recommends clinicians proactively raise psychosexual function rather than wait to be asked, and it names weight, hirsutism, mood disorders, infertility, and PCOS medications as contributing factors — not vaginal tissue physiology specifically.

The androgen picture itself is even thinner. PCOS raises circulating androgens, and vaginal and vulvar tissue does carry androgen receptors, so a direct hormonal mechanism is plausible — but no PCOS-specific study has tested whether higher androgens raise or lower dryness and pain, the way free testosterone’s negative correlation with desire has been tested directly. Treat any claim that androgen excess by itself explains dryness or pain as a reasonable hypothesis, not a demonstrated one.

Why do hormonal contraceptives cause dryness for some people?

A combined hormonal contraceptive can lower free testosterone through a large, measurable shift in a binding protein, and the effect often outlasts the prescription. In a retrospective study of 124 women with sexual health complaints, sex hormone-binding globulin (SHBG) levels in women continuing a combined pill were nearly four times higher than in women who had never used one (157 vs 41 nmol/L, P < 0.0001), and levels stayed significantly elevated compared with never-users even more than 120 days after stopping (Panzer et al., 2006).

SHBG binds testosterone and makes it biologically inactive, so a rise this large drives free testosterone down substantially. That is plausibly relevant here because androgens, alongside oestrogen, help maintain vaginal blood flow, tissue thickness, and lubrication. This is a documented hormonal shift with a plausible downstream effect — not a demonstrated cause of dryness specifically, since no trial has measured lubrication or pain before and after starting or stopping a combined pill in a PCOS population.

This matters for a common, specific scenario: a combined pill prescribed for acne, hirsutism, or cycle control is the same medication most likely to be suppressing the hormone signal that supports lubrication. If dryness or pain started or worsened after beginning hormonal contraception, that timing is worth mentioning to a prescriber directly, alongside whatever the pill was originally started for.

What role do comorbid conditions play, beyond the hormones?

Two comorbidities plausibly matter more than any single hormone number: insulin resistance, which affects a majority of people with PCOS depending on phenotype, and depression, which the same 2025 meta-analysis links to lower sexual-function scores across every FSFI domain, not only desire (Bachega et al., 2025).

Poorly controlled glucose is a plausible physical contributor through reduced blood flow and nerve sensitivity in genital tissue — the same mechanism implicated in sexual dysfunction linked to diabetes generally — though this has not been measured directly for pain or dryness in a PCOS cohort specifically. It sits alongside, not instead of, the psychological pathway. Depression is documented to correlate more strongly with sexual-function scores in PCOS than testosterone does, and while that finding was reported for FSFI totals and the desire domain rather than lubrication or pain specifically, it points at a mechanism that plausibly extends across the whole questionnaire rather than sitting isolated in one item.

What non-PCOS causes need their own diagnosis?

At least six causes of painful sex and dryness have nothing to do with PCOS and need their own evaluation, starting with vulvodynia — chronic vulvar pain that affects roughly 7 to 8% of women by age 40, according to a population-based survey of more than 19,000 women across two U.S. regions (Harlow et al., 2014).

Lichen sclerosus causes thinning, whitened, tearing vulval skin that makes penetration painful independent of lubrication; its distinguishing signs, delayed diagnosis, and small associated cancer risk are covered in full separately, and it is treated with a prescription steroid, not a lubricant. Pelvic floor dysfunction — muscles at the vaginal opening that stay too tight rather than too weak — causes pain specifically at initial penetration and is frequently missed, because a routine pelvic exam does not always reveal it unless a clinician specifically tests muscle tone. Deep infiltrating endometriosis causes pain positioned deep in the pelvis during penetration, distinct from entry pain, and how PCOS and endometriosis differ on their own diagnostic criteria is covered in full separately. An active yeast or bacterial infection causes pain and dryness together with a change in discharge, not a change in discharge alone — what different discharge patterns typically mean is worth checking against directly. And falling oestrogen in perimenopause causes genitourinary syndrome of menopause (GSM), which thins and dries vaginal tissue directly and affects an estimated 14% to 87% of postmenopausal women depending on how it’s measured — a wide range that itself signals under-recognition rather than rarity (Carlson & Vadakekut, StatPearls, 2026).

What actually helps — lubricants, moisturizers, and pelvic floor physiotherapy

Lubricant choice matters more than most people are told, and the three main types are not interchangeable. Water-based lubricants are compatible with condoms of every material and with silicone toys, but dry out fastest and often need reapplication. Silicone-based lubricants last far longer and are still safe with latex condoms, but silicone-based lubricant breaks down silicone toys on contact and should not be paired with them. Oil-based lubricants and most natural oils degrade latex condoms within minutes and should be used only with polyurethane condoms or with no condom at all.

Glycerin, a common ingredient in water-based lubricants, is also a sugar alcohol, and a product with a high glycerin concentration raises the local osmolality of vaginal tissue enough to draw water out of cells in some people — which can worsen irritation rather than relieve it, and has been associated anecdotally with more frequent yeast overgrowth in people already prone to recurrent infections. Checking the ingredient list for glycerin’s position and concentration, and switching to a glycerin-free formula if irritation persists despite regular lubricant use, is a reasonable troubleshooting step before assuming nothing will work.

A vaginal moisturizer is a separate product from a lubricant. It’s used regularly regardless of sexual activity, to maintain tissue hydration over days rather than minutes, and it is the more appropriate choice when dryness is present outside of sex as well as during it.

Pelvic floor physiotherapy is a real referral that most people are never told to ask for, and it measurably works. In a randomized trial of 212 women with provoked vestibulodynia, multimodal physical therapy — pelvic floor exercises with biofeedback, manual therapy, and graduated dilation — outperformed topical lidocaine on pain during intercourse, sexual function, and satisfaction, both at the end of treatment and six months later. Seventy-nine percent of the physical therapy group reported being much or very much improved, compared with 39% on lidocaine (Morin et al., 2021). Ask a GP or gynaecologist for a referral to a pelvic floor physiotherapist by name — the specialty is often not offered unless it’s specifically requested.

For dryness driven by genuinely low oestrogen — perimenopause, breastfeeding, or an anti-oestrogen medication — vaginal oestrogen is one option a clinician may consider alongside non-hormonal moisturizers, weighed against the same medical-history factors that apply to any oestrogen-containing treatment. This is a discussion to have with a prescriber, not a decision to make from a product description.

Who this does not help

None of the above replaces a direct exam for pain that started after a new partner or unprotected sex, since infection needs its own test regardless of PCOS history. Lubricant and moisturizer strategies do not address lichen sclerosus, vulvodynia’s nerve-level pain, or a tight pelvic floor — those need a steroid, a pain-focused treatment plan, or physiotherapy respectively, not a change in lubricant brand. And nothing here overrides a same-day exam for the red flags above. Dryness is a reasonable first explanation for pain during sex, but it is not the only one, and it should not be the last one tried before something else is ruled out.

Note: in May 2026, PCOS was renamed polyendocrine metabolic ovarian syndrome, or PMOS, by a global consensus of more than 50 organisations. Same condition, same mechanisms described above — only the label changed. This article uses PCOS, since that is still the term most readers search.

Frequently asked questions

Your next step

Track three things for two weeks: whether pain is at entry or deep, whether it happens every time or only sometimes, and whether you’ve noticed any bleeding afterward. That record turns a vague complaint into something a clinician can act on quickly, and it is the fastest route to whichever of the causes above is actually yours — hormonal, structural, or something else entirely.