Vaginal Health · Complete Guide
Common Vaginal
Infections,
Explained.
What causes vaginal infections, how to recognise them, and the practical steps to restore and protect your microbiome naturally.
1 in 3
Women experience BV
75%
Experience thrush at least once
50%
BV recurrence within 12 months
Foundation
What Is the Vaginal Microbiome
The vaginal microbiome is a delicate ecosystem of protective bacteria, mostly types of Lactobacillus, that help keep the vagina healthy, balanced and comfortable.
When the microbiome is disrupted, symptoms can appear quickly. Knowing how to care for it is the foundation of intimate wellness.
A strong microbiome supports
Natural acidic pH
Protection against pathogens
Odour control
Natural lubrication
Comfort and resilience
Prevention of recurrence
Your vaginal pH should sit between 3.8–4.5 — slightly acidic. This acidity is produced by Lactobacillus bacteria and creates an environment hostile to harmful pathogens.
Causes
What Can Disrupt the Vaginal Microbiome
The vaginal microbiome is sensitive and influenced by many everyday factors. Disruption doesn't always mean infection, but it often leads to symptoms that feel uncomfortable or unfamiliar.
Antibiotics
Wipe out beneficial bacteria alongside the targeted bacteria, leaving the vaginal environment vulnerable to overgrowth of yeast or disruption by other organisms.
Hormonal Changes
Periods, perimenopause, pregnancy and postpartum all shift oestrogen levels, directly affecting Lactobacillus populations and vaginal pH.
New Sexual Partners
Introduces new bacteria and semen (which has a higher pH of ~7.2), temporarily disrupting the acidic vaginal environment after intercourse.
Stress & Poor Sleep
Elevated cortisol suppresses immune function and can shift the vaginal microbiome toward less protective bacterial communities.
Tight or Synthetic Underwear
Traps moisture and heat, creating the warm, damp environment that yeast and unwanted bacteria thrive in.
Fragranced Products
Scented soaps, wipes and sprays disrupt the natural bacterial balance and can cause micro-irritations that break down the protective vaginal lining.
Menstruation
Blood temporarily raises vaginal pH, making the environment less hospitable to Lactobacillus. Many women notice more symptoms in the days around their period.
Sweating, Gym & Swimming
Chlorinated pools and prolonged moisture from exercise alter vaginal pH and can wash away beneficial bacteria when combined with synthetic fabrics.
Common Infections
Recognising Vaginal Infections & Imbalances
Understanding the differences between BV, thrush, and pH imbalance helps you respond faster and more effectively.
Most Common
Bacterial Vaginosis (BV)
BV occurs when the natural balance of vaginal bacteria changes and the protective lactobacilli decrease. It is the most common vaginal condition in women aged 15–44.
Fishy or strong odour, particularly after sex
Thin grey or milky discharge
Increased discharge after intercourse
Mild irritation or burning
Research · 2025
A landmark study led by Monash University and Alfred Health found that treating both members of heterosexual couples for BV led to significantly lower recurrence than treating only the female partner — supporting the role of partner reinfection. Published in The New England Journal of Medicine.
Yeast Overgrowth
Thrush (Yeast Infections)
Thrush happens when yeast — usually Candida albicans — overgrows in the vaginal environment. It often flares after antibiotics, stress, or when the microbiome is weakened.
Intense itching or burning sensation
Redness and swelling of the vulva
Thick white "cottage cheese" discharge
Pain or discomfort during intimacy
Key Fact
Up to 75% of people with a vagina will experience at least one episode of thrush in their lifetime. Around 5–8% experience recurrent thrush (4+ episodes per year), often linked to antibiotic overuse or immune changes.
Often Overlooked
pH Imbalance Without Infection
Sometimes symptoms appear without a true infection. These are often signs of a disrupted pH rather than BV or thrush — and respond well to gentle microbiome support.
Mild odour without discharge changes
Watery discharge after your period
Irritation or burning after sex
Unexplained dryness or discomfort
Important to Know
pH imbalance is often misdiagnosed or self-treated incorrectly with antifungals. If symptoms are mild and recurrent without a confirmed infection, supporting the microbiome with probiotics and pH-balanced products is often more effective.
Natural Support
How to Support a Healthy Vaginal Microbiome Naturally
Small, consistent habits make the biggest difference. Here's what the evidence supports.
Use pH Balanced Intimate Products
Harsh soaps and body washes are formulated for skin pH (~5.5) and are far too alkaline for vaginal use. Choose gentle, pH-friendly washes designed for the vulva only — never internally. The vagina is self-cleaning and does not need internal washing.
Support Hydration and Comfort
Dryness weakens the vaginal lining and increases susceptibility to micro-irritations and infection. Hyaluronic acid-based products and comfort suppositories help maintain moisture and resilience, particularly during hormonal shifts like perimenopause or postpartum.
Introduce Beneficial Bacteria
Probiotic suppositories can help restore a more balanced vaginal environment by reintroducing protective Lactobacillus strains directly where they're needed. This is especially useful after antibiotics or a course of antifungals.
Avoid Fragrances and Internal Washing
No perfumes, scented wipes, deodorant sprays, or internal douching — the vagina is a self-regulating ecosystem. External fragrances disrupt the bacterial balance and can cause ongoing irritation that mimics the symptoms of BV or thrush.
Wear Breathable Underwear
Bamboo and organic cotton allow air circulation and moisture management, preventing the warm, damp conditions that encourage yeast and bacterial overgrowth. Avoid tight synthetic fabrics, particularly during exercise or sleeping.
Care Before and After Intimacy
Urinating after sex helps flush bacteria from the urethra. Using a pH-balanced intimate wash after sex can help restore balance quickly. Boric acid suppositories used after intercourse can also help prevent BV recurrence in those prone to partner reinfection.
Consider Your Diet and Gut Health
The gut and vaginal microbiomes are interconnected. A diet high in fermented foods (yoghurt, kefir, kimchi), fibre, and low in refined sugars supports beneficial Lactobacillus populations. Reducing sugar is particularly important for preventing thrush recurrence.
Know When to See a Doctor
Persistent or worsening symptoms, unusual discharge, pelvic pain, or symptoms that don't respond to natural support should always be assessed by a healthcare provider. BV in particular requires prescription antibiotics (metronidazole or clindamycin) for confirmed cases. Natural support works best as prevention and maintenance, not replacement for medical treatment.
"Knowing what's happening in your body — and why — is the first step to feeling comfortable in it again."— Pinc Wellness
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