Why declining estrogen changes your intimate skin — and why regular skincare isn't enough

Collagen, hydration, elasticity and the vaginal microbiome: the science behind intimate skin changes during perimenopause and menopause.

You probably know what happens to your facial skin as you age.

Collagen declines. Hydration changes. Skin becomes thinner, drier and sometimes more sensitive.

And you've probably adapted your skincare routine along the way. Perhaps you've introduced hyaluronic acid, a richer moisturizer or ingredients designed to support your skin barrier.

But here's something we rarely talk about.

Your intimate skin is changing too.

And unlike your face, those changes aren't driven by ageing alone. They're closely connected to one of the most significant hormonal transitions in your life: the decline in estrogen.

During perimenopause and menopause, changes in estrogen levels can affect the structure, hydration, elasticity and microbial environment of your vulva and vagina.

Yet intimate care is still often reduced to two things: washing and lubrication.

The reality is more complex.

And understanding the biology behind these changes is the first step toward caring for your intimate skin differently.

1. Your intimate skin is hormonally active

Your vulva and vagina aren't simply passive tissues.

They respond to hormones, particularly estradiol, the main estrogen produced by the ovaries during the reproductive years.

Estrogen receptors are present throughout the female genital tract, including in vaginal tissues and parts of the vulva.

When estradiol binds to these receptors, it influences processes involved in tissue maintenance, blood supply, cellular maturation and structural integrity.

But first, an important distinction.

The vulva and vagina aren't the same thing.

The vulva is the external genital area, including the labia, clitoral structures and surrounding skin.

The vagina is the internal muscular canal lined by a specialized mucosal epithelium.

Different parts of the vulva also have different characteristics. Some areas are covered by keratinized skin, while others have thinner, more delicate surfaces.

This matters because products formulated for facial skin aren't automatically appropriate for vulvar skin, and products intended for external intimate care aren't necessarily suitable for use inside the vagina.

2. What happens when estrogen starts to decline?

During perimenopause, estradiol levels don't simply decrease in a straight line.

They fluctuate.

Some cycles may involve relatively high estrogen levels, while others involve much lower concentrations.

As menopause approaches and ovarian follicular activity declines, estradiol production becomes progressively less consistent.

After menopause, circulating estradiol levels remain substantially lower than during the reproductive years.

Although the body continues producing some estrogen through peripheral tissues, including adipose tissue, this doesn't fully reproduce the hormonal environment previously maintained by the ovaries.

For estrogen-responsive genital tissues, these changes can have important consequences.

Vaginal tissues may become thinner, less elastic and more susceptible to irritation.

Natural vaginal moisture may decrease.

And the external vulvar area may become more sensitive to friction, cleansing products and everyday activities.

These changes don't happen to every woman in the same way or at the same time.

But they have a recognized medical name: genitourinary syndrome of menopause, or GSM.

3. Collagen: why intimate tissues can lose elasticity

We hear a lot about collagen when it comes to facial ageing.

But collagen isn't exclusive to your face.

It's a major structural protein found throughout the body, including in the connective tissues supporting the vulva and vagina.

Collagen helps provide strength and structural support, while elastin contributes to the ability of tissues to stretch and return toward their original shape.

Estrogen influences the maintenance and remodelling of these tissues.

When estrogen levels decline, changes in collagen organization, tissue thickness and elasticity can occur.

In the vagina, this may contribute to reduced flexibility and greater susceptibility to discomfort during penetration or friction.

The surrounding connective tissues can also undergo age-related and hormonal changes.

However, it's important to understand that a cosmetic product containing collagen, or an ingredient associated with collagen production, doesn't necessarily reverse these structural changes.

Supporting surface comfort and restoring estrogen-dependent tissue structure are two different things.

And both deserve to be understood.

4. Hyaluronic acid: why hydration matters beyond your face

Hyaluronic acid is one of the best-known ingredients in modern skincare.

Its popularity comes from its ability to bind water and contribute to tissue hydration.

But hyaluronic acid isn't simply a beauty ingredient.

It's a naturally occurring component of the extracellular matrix found in many tissues throughout the body.

Within intimate tissues, hydration contributes to comfort, flexibility and the ability to tolerate everyday friction.

When estrogen declines, changes in vaginal tissue structure and moisture can make dryness more noticeable.

This can affect everything from wearing fitted clothing to exercising, walking or having sex.

Hyaluronic acid-based moisturizers are among the non-hormonal options used to manage vulvovaginal dryness.

Their role is to improve moisture and comfort, rather than replace estrogen.

And that distinction is essential.

Hydration can improve how tissues feel. It doesn't necessarily correct the hormonal changes affecting them.

5. Your skin barrier matters. Especially when skin becomes more sensitive.

Your skin barrier is responsible for limiting water loss and protecting underlying tissues from external irritants.

On the vulva, this protective function is particularly important because the area is regularly exposed to moisture, friction, sweat, urine and cleansing products.

During perimenopause and menopause, hormonal changes can contribute to dryness and increased sensitivity.

Skin that previously tolerated certain products may begin reacting differently.

A cleanser that once felt perfectly comfortable might suddenly cause tightness or irritation.

Frequent washing may become less tolerable.

And friction from underwear, exercise or sexual activity may become more noticeable.

But here's something worth remembering:

More cleansing doesn't mean better intimate care.

The vagina has its own self-cleaning mechanisms.

The external vulva needs gentle hygiene, not aggressive washing.

Repeated cleansing, harsh surfactants and fragranced products can irritate sensitive external skin.

The goal is to remove everyday impurities while respecting the skin's protective function.

Gentle cleansing, without overdoing it

This is the philosophy behind nudd. Prebiotic Intimate Wash Gentle Foam.

Its soap-free formula combines prebiotic ingredients with carefully selected skin-conditioning and soothing components for gentle external intimate cleansing.

Designed to remove everyday impurities without unnecessary harshness, it fits into a routine focused on comfort rather than excessive hygiene.

Because intimate care shouldn't be about washing more.

It should be about understanding what your skin actually needs.

6. The vaginal microbiome changes with estrogen too

Your vaginal microbiome is a complex ecosystem of microorganisms that contributes to vaginal health.

During reproductive years, estrogen supports the maturation of vaginal epithelial cells and the accumulation of glycogen.

As these cells shed, glycogen-derived carbohydrates become available to microorganisms living in the vagina.

Certain Lactobacillus species use these nutrients and contribute to the production of lactic acid.

This helps maintain the typically acidic vaginal environment associated with many healthy premenopausal microbiomes.

When estrogen levels decline, the vaginal epithelium may contain less glycogen.

For some women, this is associated with a reduction in Lactobacillus dominance and an increase in vaginal pH.

These changes can influence the vaginal microbial environment and may contribute to altered discharge, irritation or changes in natural odor.

However, not every postmenopausal woman has the same microbiome composition, and a higher vaginal pH after menopause doesn't automatically mean infection.

It's also important not to confuse the vaginal microbiome with the microbiome of external vulvar skin.

They are related environments, but they aren't identical.

And external skincare products shouldn't be assumed to restore the internal vaginal microbiome unless that effect has been specifically demonstrated.

7. Why your regular skincare routine isn't enough

Think about the way you care for your face.

You probably choose products according to your skin's needs.

A gentle cleanser when your skin feels sensitive.

A hydrating serum when it feels dry.

A richer moisturizer when your skin barrier needs additional protection.

Yet when it comes to intimate care, women are often offered little more than a cleanser or a lubricant.

But the intimate area has its own characteristics.

Vulvar skin is exposed to friction, moisture and occlusion. Vaginal tissues respond strongly to estrogen. And the vaginal microbiome operates within a specialized biological environment.

This means your usual facial moisturizer, fragranced body lotion or exfoliating treatment isn't necessarily suitable for intimate use.

Ingredients such as retinoids, exfoliating acids and fragrances may be well tolerated on some areas of the body but inappropriate or irritating on sensitive genital skin.

And a product being labelled natural doesn't automatically make it suitable.

Intimate skincare needs to be formulated for intimate skin.

That means paying attention to ingredient selection, intended application area, tolerability and the specific needs of the tissues involved.

Not simply adapting facial skincare and assuming the same rules apply.

8. Moisturizing, nourishing and lubricating aren't the same thing

These terms are often used interchangeably.

But they describe different functions.

Moisturizing

Moisturizers are designed to improve hydration and reduce the discomfort associated with dryness.

Depending on their formulation and intended use, they may be suitable for external vulvar skin or internal vaginal tissues.

Humectants such as hyaluronic acid can help retain water, while other ingredients may contribute to surface comfort.

Nourishing and protecting

Balms and oils can provide emollient and protective effects on external skin.

They can reduce moisture loss, soften dry areas and decrease friction against sensitive surfaces.

For example, nudd. Intimate Repairing Balm and Intimate Moisturizing Oil fit into an external care approach focused on comfort, softness and protection.

However, oil-based products aren't necessarily suitable for internal vaginal use and can weaken latex condoms.

Always follow the intended use of each product.

Lubricating

Lubricants reduce friction during sexual activity, intimate massage or other situations where additional glide is needed.

A water-based personal lubricant can improve comfort when natural lubrication is insufficient.

nudd. Prebiotic Water-Based Personal Lubricant is designed for this purpose.

But a lubricant doesn't necessarily provide the same ongoing moisturizing function as a dedicated moisturizer.

And neither lubricants nor cosmetic balms replace medical treatment when estrogen deficiency is causing significant tissue changes.

Different needs require different approaches.

9. What about irritation, heat and unexpected sensitivity?

Hormonal changes can make intimate comfort feel less predictable.

Some days, everything feels perfectly normal.

Other days, fitted clothing, sweat, exercise or prolonged friction may leave external intimate skin feeling more sensitive.

During perimenopause, hot flushes and increased sweating can also make the genital area feel warmer or less comfortable.

Not every episode of sensitivity requires additional washing.

Sometimes, repeated cleansing can add to the problem.

A gentle external-care routine and products designed to provide hydration and comfort may be more appropriate.

A little freshness, without another wash

nudd. Intimate Mist pH Balance was created for moments when external intimate skin needs a refreshing boost.

Its lightweight prebiotic formula combines hydrating and soothing ingredients with a subtle botanical freshness.

Designed for external use, it offers a convenient way to refresh delicate skin without repeatedly washing the area.

It doesn't replace treatment for infections or persistent irritation, and external application shouldn't be confused with correcting vaginal pH.

It's simply another way to care for skin that may feel different from one day to the next.

10. When skincare isn't enough: understanding GSM

There's an important difference between occasional external dryness and the structural tissue changes associated with declining estrogen.

Genitourinary syndrome of menopause can involve the vulva, vagina, urethra and bladder.

Symptoms may include:

• Persistent vaginal or vulvar dryness

• Burning, itching or irritation

• Discomfort or pain during penetration

• Reduced natural lubrication

• Urinary urgency or discomfort

• Recurrent urinary tract infections

Unlike hot flushes, which may become less frequent over time, GSM symptoms can persist or progress without appropriate treatment.

Non-hormonal moisturizers and lubricants can improve symptoms for many women.

But when estrogen deficiency is contributing to changes in vaginal tissue thickness, elasticity and function, medical treatments may be needed.

Low-dose vaginal estrogen is one established option.

It acts directly on estrogen-responsive tissues and can improve dryness, irritation and other GSM symptoms.

Other prescription treatments may also be appropriate depending on individual circumstances.

Systemic menopausal hormone therapy doesn't always fully resolve genitourinary symptoms, so some women may need additional local treatment.

This is why intimate skincare and medical treatment shouldn't be positioned as competitors.

One supports everyday comfort. The other may address underlying hormonal changes.

And sometimes, women benefit from both.

11. How should your intimate care routine change during menopause?

There isn't one routine that works for everyone.

But understanding what your tissues need can make everyday care more intentional.

Cleanse gently.

Wash the external vulva with lukewarm water, using a mild, suitable cleanser if preferred. Avoid unnecessary internal cleansing, aggressive surfactants and excessive washing.

Hydrate when needed.

If dryness is becoming more noticeable, choose a moisturizer specifically intended for the area you're treating.

Protect sensitive external skin.

Appropriate balms or emollients can reduce friction and support comfort when external vulvar skin feels dry.

Reduce friction during intimacy.

Use a compatible personal lubricant when additional glide is needed.

Pay attention to persistent symptoms.

Burning, pain, bleeding, recurrent urinary infections or persistent dryness deserve medical assessment.

And remember that not every genital symptom during menopause is caused by low estrogen.

Conditions such as vulvar dermatitis, lichen sclerosus, infections and other skin disorders may require different treatment.

A good intimate care routine starts with understanding the cause, not simply applying more products.

Your intimate skin deserves the same attention as the rest of your body. But not necessarily the same products.

We've spent decades learning about facial skincare.

We understand collagen, hydration, barrier function and the importance of adapting our routines as our skin changes.

Yet the skin and tissues of our intimate area have rarely received the same attention.

During perimenopause and menopause, declining estrogen can change tissue structure, moisture, elasticity and microbial conditions.

These changes are biological.

They're not evidence of poor hygiene, a lack of self-care or something women should simply tolerate.

And while skincare can't replace estrogen or reverse every hormonal change, thoughtfully formulated products can play a meaningful role in supporting everyday comfort.

At nudd., we believe intimate care should evolve with your body.

Not by adding unnecessary steps.

Not by encouraging more washing.

But by understanding what changes, why it changes and what your intimate skin actually needs.

hormones change. your intimate skin does too.

This article is for educational purposes and does not replace professional medical advice, diagnosis or treatment.

Sources:

ACOG — Vulvovaginal Health: cambios anatómicos, sequedad y tratamientos. 

British Menopause Society — GSM Consensus Statement: efectos de la deficiencia estrogénica sobre vulva, vagina, vejiga y uretra. 

Systematic Review — Hormonal Treatments and Vaginal Moisturizers for GSM: evidencia sobre tratamientos hormonales y no hormonales.

COG — Experiencing Vaginal Dryness: hidratación, lubricación y estrógenos locales.