Vaginal dryness Vaginal dryness is one common manifestation of genitourinary syndrome of menopause, but GSM also includes vulvar, sexual, and urinary changes. This article focuses specifically on the tissue mechanisms that produce dryness and impaired lubrication. Estrogen influences several but controls none alone. Because these systems decline at different rates in different women, dryness varies widely even at similar hormone levels.
Key points
● Moisture is something tissue produces, not a substance it stores.
● Most vaginal lubrication is plasma crossing the vaginal wall — a vascular event.
● Barrier lipid loss produces burning and stinging, often with only mild dryness.
● Sensory nerves change independently, so symptoms can exceed what an examination shows.
● Systems decline at different rates, which may be why women's experiences differ so much.
Is vaginal dryness just low estrogen?
No. Estrogen influences several of the systems producing moisture, but controls none of them alone.[1,2]
We use "dry" as though it names a missing substance. But vulvovaginal moisture is a property tissue produces, and production depends on five systems working together.
How Does the Five-Axis Model Explain Vaginal Dryness?
The five-axis framework describes the broader biology of vulvovaginal and urinary change. Vaginal dryness arises most directly from changes within the epithelial/stromal, vascular, and neurological/sensory axes, while intracrine hormone supply and the microbial environment modify how those tissues function and how symptoms are experienced.
Then reorganize the current dryness mechanisms underneath the formal axes:
| Formal axis | Dryness-related mechanisms |
|---|---|
| Epithelial/stromal | Epithelial thickness, surface integrity, barrier lipids, collagen, elastin, glycosaminoglycans, and matrix hydration |
| Vascular | Perfusion and vaginal transudation during arousal |
| Neurological/sensory | Sensory thresholds, burning, stinging, autonomic reflexes, and perception of tissue state |
| Intracrine | Local conversion of DHEA into androgenic and estrogenic metabolites that influence the other tissue systems |
| Microbial | Glycogen availability, Lactobacillus dominance, pH, irritation, and susceptibility to dysbiosis |
Where does vaginal lubrication actually come from?
Most vaginal lubrication is not secreted by a gland. It is plasma moving across the vaginal wall from the vessels beneath it.
Lubrication is therefore, mechanically, a vascular event. If perfusion drops, lubrication drops — even with intact epithelium and adequate-looking hormone levels. Androgen signalling is a significant contributor to vascular responsiveness in this tissue.[2,3]
This is the most frequently missed mechanism, and it explains arousal that no longer produces a physical response.
Why can it hurt when nothing looks wrong?
Because sensory nerves change their responsiveness independently of the tissue's structural state.
Nerves in this region do two jobs: they report tissue condition, and they participate in the reflex that drives blood flow during arousal. When their responsiveness shifts, signals previously below the threshold of awareness begin registering as burning, stinging or discomfort.[2,3]
This is why examination findings and reported symptoms so often disagree, in both directions — visible thinning with little discomfort, or significant pain with an unremarkable examination. Neither is a contradiction. They are measuring different systems.
It also means symptoms can fluctuate with things that alter autonomic tone: stress, illness, sleep loss. → Does Stress Affect Vaginal Dryness?
Why do two women with the same hormone levels have different symptoms?
Because the five systems do not decline together. They shift at different rates, in different orders.
One woman keeps vascular responsiveness while her epithelium thins: irritation and fragility. Another keeps epithelial thickness while perfusion falls: arousal without response. A third loses barrier lipids first: burning, with little obvious dryness.
Same diagnosis. Different tissue, different experience, different thing that would help.
This is why a hormone level cannot predict who will be symptomatic. It describes one input to a system with several.
What role do hormones still play?
Two supply lines, not one. Estrogen influences epithelial structure and baseline hydration.[1,2] Vulvar and vaginal tissue also produces androgens locally from circulating DHEA, and androgen signalling contributes to the vascular and sensory functions above.[3,5]
Circulating DHEA declines steadily from around age 30.[5] → Intracrine Hormone Signaling
This is also why estrogen alone often produces partial improvement. → Why Estrogen Isn't Enough
Why doesn't adding moisture accumulate?
Because it addresses the output rather than the system producing it. Relief is real and worth having; it just doesn't build. → Why Moisturizers Stop Short
What should I notice about my own symptoms?
The pattern is more informative than the intensity. Most women have more than one. Naming which are loudest turns "I'm dry" into something a clinician can work with.
Seek evaluation for anything new, persistent, one-sided, or accompanied by bleeding, lumps or skin colour change. Postmenopausal bleeding always warrants assessment and is never something to manage with a topical product.
Frequently asked questions
Is vaginal dryness after menopause inevitable? No. Tissue changes are common, but severity and progression vary widely, and the systems involved differ between women.
Why do I burn but not feel dry? That pattern suggests barrier lipid loss rather than reduced moisture. A depleted barrier makes tissue reactive to contact, soap and friction even when hydration is adequate.[2]
Can dryness happen before menopause? Yes. Circulating DHEA declines from around age 30, well before the menopausal transition.[5]
Does a normal hormone test rule this out? No. Diagnosis of genitourinary changes at menopause is clinical; no laboratory test confirms it.[1,6]
Is dryness the same as atrophy? "Vulvovaginal atrophy" is an older term focused on thinning. GSM better reflects the multi-system nature of these changes.[1] → What Is GSM?
What's established, and what isn't
Established: epithelial thinning and reduced glycogen after menopause; the vascular basis of lubrication; barrier lipid decline; matrix remodelling; local androgen production from DHEA; the age-related fall in circulating DHEA.[1–5]
Inferred: that these systems decline at independent rates, and that symptom pattern indicates which are most affected. Consistent with clinical observation; not validated as a diagnostic method.
Not established: any test reporting which system is limiting for you.
For the broader clinical framework: Read What Is Genitourinary Syndrome of Menopause?, which explains the full symptom cluster, clinical diagnosis, and five-axis tissue model.
Educational note: For educational purposes only. Persistent or new symptoms should be evaluated by a qualified healthcare provider.
By Laura Kelly, DAOM, L.Ac., Dipl. O.M. A California-licensed primary care provider and nationally board-certified clinician with a clinical focus on women’s health and healthy aging. Research Scholar, Ronin Institute. ORCID: 0000-0001-6586-7308. More about Dr. Kelly
References
1. Portman DJ, Gass ML. Genitourinary syndrome of menopause: new terminology. Menopause. 2014;21(10):1063–1068. doi:10.1097/GME.0000000000000329
2. The NAMS 2020 GSM Position Statement Editorial Panel. The 2020 GSM position statement. Menopause. 2020;27(9):976–992. doi:10.1097/GME.0000000000001609
3. Traish AM, Vignozzi L, Simon JA, Goldstein I, Kim NN. Role of androgens in female genitourinary tissue structure and function. Sex Med Rev. 2018;6(4):558–571. doi:10.1016/j.sxmr.2018.03.005
4. Sturdee DW, Panay N; International Menopause Society Writing Group. Recommendations for the management of postmenopausal vaginal atrophy. Climacteric. 2010;13(6):509–522.
5. Cellai I, Di Stasi V, Comeglio P, et al. Insight on the intracrinology of menopause. Endocrinology. 2021;162(2):bqaa219. doi:10.1210/endocr/bqaa219
6. Faubion SS, Sood R, Kapoor E. Genitourinary syndrome of menopause: management strategies for the clinician. Mayo Clin Proc. 2017;92(12):1842–1849. doi:10.1016/j.mayocp.2017.08.022
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