Intimate Care Guide for Women in Hong Kong: Vulva vs. Vagina, Gentle Cleansing & Daily Habits
Intimate health is something every woman deals with every day, yet it is one of the least openly discussed topics. Showering daily but still dealing with odour, changes in discharge, or recurring infections — with no obvious cause — is a shared experience for many women.
This guide was put together by Sue, founder of SERENE, starting from her own nine years of recurring infections. She is not a medical professional, so the medical information here draws on public sources — Hong Kong's Centre for Health Protection, the US CDC, the UK NHS and peer-reviewed research — listed at the end. For anything involving diagnosis or treatment, we recommend seeing a doctor.
This is an overview of daily care. For each topic, we link to a dedicated article with the full detail.
Key points first:
- Cleanse the vulva (the external skin) only, and warm water is enough. The vagina cleans itself — it doesn't need rinsing, and shouldn't be.
- Vaginal pH is roughly 3.8–4.5. Vulvar skin pH is higher, with no single agreed standard range — the two shouldn't be treated as one thing.
- Soap and more alkaline products, and strong surfactants, can irritate vulvar skin; fragrance depends on your sensitivity. If your skin is sensitive, choose a gentle, mildly acidic product and patch-test first.
- Staying dry and wearing breathable fabrics matters more than washing more often.
- Probiotics and cranberry can be part of daily wellness, but they don't replace diagnosing and treating an infection.
- Persistent or recurring itching, unusual discharge, a strong odour or painful urination — see a doctor first.
Chapter 1 | Vulva and Vagina: Two Areas, Two Environments
"Intimate area" in everyday language actually covers two different parts. The vulva is the external skin and mucosa (including the labia and the vaginal vestibule); the vagina is the internal canal. Their environments, and how to care for them, are not the same.
| Vulva | Vagina | |
|---|---|---|
| Location | External skin and mucosa | Internal canal |
| pH | Expected to fall between skin (about 4.7) and the vagina; measured values in adult women range from about 4.6 to 6.3, with no single agreed standard range | About 3.8–4.5, actively maintained by Lactobacillus |
| Does it need washing? | Can be cleansed gently with warm water or a mild, mildly acidic product | Self-cleaning — doesn't need rinsing, and shouldn't be rinsed |
| Common discomforts | Dryness, friction, contact dermatitis (irritation or allergy) | Changes in flora and infections (such as bacterial vaginosis and yeast infection) |
Vulvar skin isn't a single structure: skin on the labia majora still has a stratum corneum, but keratinisation decreases further in — on the labia minora and vestibule — gradually shifting towards mucosal tissue. One review notes that vulvar skin differs from other sites in hydration, friction and permeability, and is more susceptible to topical products than forearm skin. That's why ingredients and formulation deserve extra care for anything used in this area.
Why does this distinction matter? A lot of material applies "intimate pH 3.8–4.5" directly to external cleansers, but that is the vagina's figure. For external products, what matters is that they are gentle, mildly acidic, with a stated pH and a full ingredient list — not hitting a number that belongs to the vagina.
Further reading: Intimate Skin vs. Regular Skin: Why It Needs a Different Approach
Chapter 2 | The Vaginal Microbiome: Your Most Important Ally
The vaginal microbiome is the community of microorganisms living in the vagina; in healthy women of reproductive age it is usually dominated by Lactobacillus. Lactobacillus metabolises glycogen into lactic acid, keeping the vagina mildly acidic, and helps suppress overgrowth of harmful bacteria and fungi.
Signs that the flora or vaginal environment may have changed
- An unusual odour (especially a distinct fishy smell);
- Changes in the colour, texture or amount of discharge;
- Itching or burning in the intimate area;
- Discomfort when urinating.
Two points are worth stressing. First, changes in flora don't mean you're unclean, and they aren't a hygiene failure — many women blame themselves for years simply because nobody told them this. Second, these signs overlap: symptoms or odour alone can't tell you whether it's bacterial vaginosis, a yeast infection, a urinary tract infection or something else. That takes a doctor's assessment.
For how to tell them apart: Itching, Discharge, Odour or UTI? A Symptom-Differentiation Guide
What can affect the vaginal environment?
- Your period: menstrual blood has a pH of about 7.4, and vaginal pH may rise temporarily during your period.
- Sex: semen has a pH of about 7.2–8.0 and can temporarily raise vaginal pH.
- Hormonal changes: pregnancy, breastfeeding or menopause — declining oestrogen can thin the vaginal wall and reduce discharge.
- Antibiotics: may reduce Lactobacillus and raise the risk of yeast infection.
- Douching: Hong Kong's Centre for Health Protection states that douching does not prevent infection and may disrupt natural flora.
Chapter 3 | Daily Cleansing: How to Do It Properly
Cleanse the vulva only — never inside the vagina
Rinse the external area with warm water, using clean hands to gently cleanse the labia and the folds between them. The vagina needs no cleansing at all — not even with plain water; its self-cleaning mechanism continually carries discharge and debris outward.
If you use a cleanser, choose a gentle one designed for the vulva
Check that it is mildly acidic, states its pH, and lists its full ingredients. Avoid soaps and more alkaline products (soap can reach pH 9–10) and strong surfactants. Fragrance depends on your sensitivity — if you're sensitive to fragrance or have reacted before, choose a fragrance-free product, or patch-test on your inner forearm first.
Frequency: once a day in the shower is generally enough
Repeated use of cleansers or scrubbing hard won't make the area cleaner — it can irritate the skin instead.
Cleanse and wipe front to back
From the vaginal opening toward the anus, to avoid carrying intestinal bacteria towards the urethra and vaginal opening.
Pat dry, and keep the area breathable
Pat gently with a clean towel rather than rubbing. Choose breathable cotton underwear day to day, avoid wearing tight or non-breathable clothing for long stretches, and change out of damp or sweaty clothes promptly.
What to look for in a cleansing product
| Factor | Look for | Avoid |
|---|---|---|
| pH | Mildly acidic, with the pH stated on the label or product page | Soap and alkaline products (pH can reach 9–10) |
| Ingredients | Gentle formula with a full ingredient list | Soap-based cleansers, strong surfactants (such as SLS/SLES) |
| Fragrance | Fragrance-free if your skin is sensitive, or patch-test first | Fragrance is a common contact allergen; sensitive skin should avoid it |
| Other | Water-based formula, small packs (easy to carry) | High-concentration alcohols, scented sprays and scented wipes |
What you don't need: douches, intimate sprays and scented wipes. They don't prevent infection, but can irritate skin or disrupt the vaginal environment.
For more on reading ingredient lists and pH: Intimate Gel Guide: Ingredients, pH & How to Choose
Chapter 4 | Care Points for Different Times and Situations
| Situation | Care points | Further reading |
|---|---|---|
| During your period | Change period products regularly and stay dry; don't douche | Period Intimate Care Guide |
| After exercise / in summer heat | Change out of sweaty clothes promptly; keep the area dry and ventilated | Summer Heat & Humidity Care Guide |
| After sex | Urinate soon after, cleanse externally only, and don't rinse inside the vagina | Post-Sex Intimate Care |
| After antibiotics | Antibiotics may reduce Lactobacillus and raise yeast infection risk; see a doctor if symptoms appear | Yeast Infections After Antibiotics |
| After pubic hair removal | Avoid irritation; watch for redness and ingrown hairs | Hair Removal Aftercare Guide |
| Menopause, postpartum and other hormonal changes | Declining oestrogen makes intimate skin drier; look for a stronger-hydration, gentle product, and talk to a doctor if dryness is severe | Menopause Vaginal Dryness Guide, Postpartum Intimate Care & Pelvic Floor Recovery, Hormones & Vaginal Health |
| Travel | During long flights and routine changes, keep the basics: gentle cleansing and staying dry; you can carry small-pack cleansing or care products | — |
Chapter 5 | Care from Within: Probiotics, Cranberry and Diet
Probiotics: effects are strain-specific, and they don't replace treatment
Probiotic effects are strain-specific; results for one strain can't be applied to every product of the same species. GR-1 and RC-14 are among the longest-studied combinations in women's urogenital health, but later studies are inconsistent on whether they reliably colonise the vagina.
More importantly, current CDC guidance states for both bacterial vaginosis and vulvovaginal candidiasis that the evidence is not sufficient to support probiotics as a standard treatment or adjunct. So probiotics can be part of daily wellness, but they don't replace diagnosing and treating an infection that has already appeared. Follow each product's own instructions; taking it with a meal is a sensible default.
Full detail: Vaginal Probiotics Guide and GR-1 & RC-14 Probiotics: Clinical Research, Benefits & Limitations
Cranberry: research is focused on urinary-tract prevention
Research on cranberry proanthocyanidins (PACs) is focused mainly on the urinary tract, not the vagina itself. The latest Cochrane systematic review (2023) found that in women prone to recurrent UTIs, cranberry products probably reduce the risk of symptomatic UTIs, with moderate certainty — evidence for prevention, not treatment. The PAC content of cranberry juice varies by product and it is often sweetened, so juice alone may not reach the doses used in studies; when choosing a supplement, products that state their PAC content are more informative.
Diet: balance matters, and there are no "magic foods"
A balanced diet and enough water are good for overall health. But there is currently not enough evidence that specific foods (such as yoghurt or kiwi) directly improve vaginal flora. As for sugar: poorly controlled diabetes is a known risk factor for yeast infection, but for most people, whether cutting sugar alone prevents yeast infection has limited evidence.
Further reading: How Diet Affects Vaginal Health, Gut Health & Recurring Infections
Chapter 6 | Discharge and Odour: When It's Normal, When to See a Doctor
Further reading: Is Heavy Vaginal Discharge Abnormal?, Why Does Vaginal Odour Happen & How to Improve It?
Chapter 7 | Common Myths
Myth 1 | The more often and harder you wash, the cleaner you are
No. Over-cleansing irritates vulvar skin and doesn't make the area healthier. Gentle cleansing once a day in the shower is generally enough.
Myth 2 | The vagina needs regular rinsing
It doesn't. The vagina is self-cleaning, and Hong Kong's Centre for Health Protection states that douching does not prevent infection and may disrupt natural flora.
Myth 3 | Any odour means you're unclean
No. The vulva and groin have sweat glands, everyone has their own natural scent, and exercise or your period can change it briefly. What needs attention is a sudden, noticeable change — not the pursuit of no odour at all.
Myth 4 | Taking probiotics can replace treatment
It can't. Current CDC guidance does not list probiotics as a standard treatment for bacterial vaginosis or yeast infection. If you have signs of infection, see a doctor first to confirm the cause.
Myth 5 | Cutting out sugar prevents yeast infections
Not necessarily. Poorly controlled blood sugar is one known risk factor, but for most people the evidence that avoiding sugar alone prevents yeast infection is limited — see the Yeast Infection Guide.
When to See a Doctor
- A sudden strong fishy smell or a distinctly foul odour;
- Yellow-green, grey, frothy or blood-tinged discharge, or cottage-cheese-like discharge with itching;
- Persistent itching, redness, burning or pain in the vulva or vagina;
- Painful urination, frequency or urgency, or fever, lower abdominal pain or back pain;
- Bleeding outside your period, or after sex;
- Symptoms that keep coming back, or don't improve after self-care.
Hong Kong's Social Hygiene Service Clinics (Department of Health) offer free, confidential STI testing with no appointment or referral needed; the Family Planning Association of Hong Kong also provides gynaecological consultation and intimate health services.
External Care + Daily Wellness Options
The core of daily care is gentle cleansing and staying dry. If you'd like a daily-care product designed for the vulva, here are two options:
SERENE Intimate Essence Gel has a pH of 4.8 and a pH support system of lactic acid and sodium lactate, plus zinc gluconate, persimmon extract and sodium hyaluronate, as well as peptide ingredients and tranexamic acid; individually packed 2ml sachets, easy to carry. The formula contains fragrance and several botanical extracts, so if you have sensitive skin, patch-test first. It is positioned for daily external care — it is not a treatment product.
See SERENE Intimate Essence Gel →SERENE Cranberry & D-Mannose Probiotic Powder combines six probiotic strains with cranberry PACs and D-Mannose in one sachet. It is positioned as daily support for urinary and microbiome health — not a treatment, and not a guarantee. If you already have symptoms, see a doctor first; we'd rather say that plainly than have a supplement stand in for care you actually need.
See SERENE Cranberry & D-Mannose Probiotic Powder →FAQ
Is it normal for my intimate area to have an odour?
Yes. Everyone's vulva and groin have a natural scent, unrelated to hygiene. What deserves attention is a sudden, noticeable change — especially a fishy smell or foul odour, or one that comes with changes in discharge, itching or burning. Those should be assessed by a doctor.
What do heavier or differently coloured discharge mean?
The amount of discharge varies across your cycle and is usually highest around ovulation, which is normal. If it turns cottage-cheese-like, grey-white with a fishy smell, yellow-green or blood-tinged, or comes with itching or burning, see a doctor promptly — different infections are treated differently.
Do I need an intimate wash every day?
No. Warm water is enough to cleanse the vulva. If you'd like to use a cleanser, choose a gentle, mildly acidic one designed for the vulva with a stated ingredient list, and don't use it inside the vagina.
What should I do about recurring infections?
Recurring episodes should be diagnosed by a doctor, because bacterial vaginosis, yeast infection and other conditions are treated differently. Daily habits and probiotics are supportive — they don't replace targeted treatment.
How should I look after myself after antibiotics?
Antibiotics may reduce Lactobacillus in the vagina and raise the risk of yeast infection. If you notice itching, unusual discharge or similar symptoms, see a doctor to confirm rather than guessing. Probiotic research is inconsistent and there is no agreed fixed course; if you use one, follow the product's instructions.
How long do probiotics take to work?
There is no timeline that applies to everyone. It depends on the strain, the dose and the individual, so think of probiotics as a daily wellness habit rather than a short-term treatment. If you are pregnant, breastfeeding or being treated for something, ask a doctor or pharmacist first.
Is it normal to be more prone to discomfort around my period?
Vaginal pH may rise temporarily during your period, and hormonal changes can make skin more sensitive, so some women do notice more discomfort at this time. Changing period products regularly and staying dry helps reduce irritation; if the same symptoms appear every cycle, ask your doctor.
Related Reading
Sources
- Hong Kong Centre for Health Protection. Vaginal infections guidance.
- CDC. Bacterial Vaginosis – STI Treatment Guidelines.
- CDC. Vulvovaginal Candidiasis – STI Treatment Guidelines.
- NHS. Vaginal discharge guidance.
- Williams G, Stothart CI, Hahn D, Stephens JH, Craig JC, Hodson EM. Cranberries for preventing urinary tract infections. Cochrane Database of Systematic Reviews 2023, Issue 11. Art. No.: CD001321.
- Graziottin A. Maintaining vulvar, vaginal and perineal health: Clinical considerations. Women's Health. 2024;20:17455057231223716. doi:10.1177/17455057231223716. PMID: 38396383.
- Urasaki MBM, Brandão ES, Albuquerque RS, Masson LM, Almeida JS. O pH da região vulvar no ciclo vital: revisão de escopo [The pH of the vulvar region in the life cycle: scoping review]. Revista Eletrônica de Enfermagem. 2024;26. doi:10.5216/ree.v26.75717.
- Reid G, et al. Oral use of Lactobacillus rhamnosus GR-1 and L. reuteri RC-14. FEMS Immunology & Medical Microbiology. 2003.