Bacterial Vaginosis vs Yeast Infection — How to Tell the Difference

Bacterial vaginosis (BV) and yeast infections are often confused with each other because they share a few similarities. These are two of the most common vaginal infections women can acquire. Their signs can be similar, yet they are very different in origin, appearance and treatments. This blog sheds light on these infections, explains how to read the early signs and what science has to say about maintaining a healthy vaginal environment. If you’ve been dealing with such intimate health issues, unusual vaginal discharge types or just want to understand how to prevent such conditions, this is the right place to start.

Understanding The Vaginal Microbiome & pH Balance

Understanding the vaginal microbiome and pH balance is crucial in preventing either of these infections. Their occurrence is due to the disruption of the vaginal microfauna and a change in the natural acidic pH, which is maintained by the Lactobacillus bacteria.

The vagina has its own internal micro-environment maintained by the Lactobacillus bacteria, which ferment glycogen released from shed vaginal epithelial cells into lactic acid. This lactic acid is what keeps the vaginal pH acidic (pH 3.8-4.5). This acidic environment protects the natural mucosal lining and prevents the overgrowth of harmful bacteria, such as fungi and other harmful pathogens. When the natural microbiome of lactobacillus is disturbed, bacterial vaginosis (BV) and yeast infections can occur.

What Is Bacterial Vaginosis?

Bacterial vaginosis (BV) occurs due to the disruption of the healthy Lactobacillus bacteria in the vagina. When the Lactobacillus population drops, anaerobic bacteria such as Gardnerella vaginalis and Mobiluncus species start to multiply in the vaginal canal. This results in a shift in the vaginal pH toward a more alkaline environment, typically rising above 4.5 and often reaching between 5.0 - 6.0, which sustains the overgrowth of harmful pathogens and strips the vaginal lining of its natural acidic defence mechanisms.

BV affects roughly 30% of women of reproductive age, making it the most common vaginal infection cause in this group. What makes it particularly tricky is that nearly half of all women with BV report no symptoms at all, and most women often mistake it for something else.

Recognising BV Symptoms: Discharge Type and Odour

The vaginal discharge associated with BV has a thin, watery consistency and is usually grey or off-white in colour. The smell can often be described as “fishy” and is one of the most accurate diagnostic clues for recognising BV. This fishy odour tends to intensify after sexual intercourse because the alkaline nature of semen temporarily amplifies the odour. Most women notice only mild irritation or wetness, and if you notice this type of odour paired with a thinner-than-usual discharge, these are the V symptoms in women that are most likely pointing to BV.

What Is a Yeast Infection

Yeast infections, also known as vulvovaginal candidiasis (VVC), are fungal infections caused by the overgrowth of Candida species, most commonly Candida albicans, in the vagina. Candida, in small amounts, is commonly found in the vaginal environment. The infection develops when its population grows beyond what the vaginal microenvironment can keep in check. This can be triggered by antibiotic use (which depletes natural Lactobacillus), elevated blood sugar, hormonal shifts or immunosuppression.

There is also a well-documented interaction between BV and yeast infections that deserves attention. A 2024 paper in Frontiers in Cellular and Infection Microbiology found that BV-induced vaginal dysbiosis compromises local immune defences, creating a pro-inflammatory environment that paradoxically predisposes women to Candida overgrowth. This explains why some women experience one condition repeatedly, or even both concurrently.

Recognising Yeast Infection Symptoms

The vaginal discharge in a yeast infection is thick, white and clumpy. It’s known to have a cottage cheese-like appearance and has very little to no odour. The symptom that sets it apart is intense itching, redness and swelling of the vulva and vaginal walls. Burning during urination or intercourse is also common. If discomfort and itching are your primary concerns rather than an unusual smell, a yeast infection is the more probable cause.

Bacterial Vaginosis vs Yeast Infection - Side by Side

Understanding the differences clearly can help you communicate better with your healthcare provider and seek the right support.

Why These Infections Keep Coming Back

Recurring infections are one of the most frustrating health issues that women face. Understanding what causes recurring yeast infections or repeat episodes of BV requires looking beyond the immediate trigger.

Chronic recurrence of BV is often tied to incomplete restoration of the Lactobacillus population after antibiotic treatment, continued exposure to pH-disrupting factors (like harsh soaps, douching or unprotected intercourse) and in some cases, antibiotic resistance in the bacteria causing BV.

For yeast infections, frequent antibiotic use is a significant driver as it wipes out protective bacteria and leaves Candida free to overpopulate. Hormonal fluctuations during the menstrual cycle, pregnancy or while on hormonal contraceptives also disrupt the vaginal environment, which favours Candida growth.

Each time antibiotics are used to treat BV, they alter the broader vaginal environment. Repeat exposure over time can cause the Candida to become resistant to the antifungal treatments used against it. Treating BV repeatedly without addressing the root cause can quietly make future yeast infections harder to clear. This is precisely why prevention matters as much as treatment.

How to Prevent Vaginal Infections Naturally

The most effective strategy for how to prevent vaginal infections naturally is protecting the balance of the vaginal microbiome and maintaining the vaginal pH before it breaks down.

WYN Intimate Hygiene Wipes and Intimate Hygiene Spray are formulated with natural ingredients with well-documented antimicrobial and antifungal activity. These ingredients show fungicidal action against Candida species while supporting the beneficial Lactobacillus strains. Both are balanced to vaginal pH and designed for regular external use without disrupting the internal microbiome.

For internal vaginal care, WYN Intimate Vaginal Cream helps maintain vaginal wall integrity by stimulating the synthesis of collagen, hyaluronic acid, and elastin. It supports normal vaginal microbiota, restores pH balance and addresses dryness, irritation and discomfort, which help prevent recurring infections.

For women in or approaching menopause, where falling estrogen levels cause glycogen depletion, pH rise and increased susceptibility to infection, WYN Soothing Vaginal Cream offers natural phytoestrogen support, helping restore the vaginal mucosa, maintain normal microbiota and pH balance, and support the Lactobacillus environment.

When to See a Doctor

Neither BV nor a yeast infection should be self-diagnosed or self-treated. Both require proper identification and medical knowledge to diagnose and treat the exact cause. Sometimes sexually transmitted infections can present with overlapping V symptoms in women, which is why consulting a doctor is important. If you notice unusual discharge, persistent odour, significant itching or any discomfort that doesn’t resolve within a few days, consult your gynaecologist. Early and accurate diagnosis prevents the escalating cycle of recurrence and reduces the risk of complications associated with such health issues.

Frequently Asked Questions

What does bacterial vaginosis smell like?

BV typically produces a fishy or unpleasant odour from the vaginal area, which tends to be more noticeable after sexual intercourse. This is caused by the amines produced by anaerobic bacteria when exposed to alkaline conditions, such as semen. Not all women with BV notice a smell, but when it is present, it is usually the most distinguishing feature.

Can BV go away on its own?

In some cases, mild BV may resolve without treatment, but this is not predictable or reliable. Left untreated, BV can increase the risk of acquiring STIs and may lead to complications during pregnancy. You should always consult your doctor for the required medical treatment rather than waiting it out.

What causes recurring yeast infections?

Recurring yeast infections are commonly linked to antibiotic use, hormonal changes, elevated blood sugar levels in unmanaged or prediabetic individuals and immune suppression. In some women, genetic susceptibility or a persistently altered vaginal microbiome following BV treatment plays a role. For a diagnosis and treatment plan tailored to your specific condition, always consult a gynaecologist or healthcare professional.

Can intimate wipes prevent BV?

Intimate wipes are external hygiene products and are not meant to treat or clinically prevent BV once the internal microbiome has already been disrupted. However, pH-balanced wipes formulated with antimicrobial botanicals can reduce the burden of external pathogens and support the conditions required for a healthier intimate environment. These wipes are a preventive hygiene measure, not a replacement for proper medical care from a doctor.

Is BV contagious?

BV is not classified as a sexually transmitted infection. However, certain hygiene habits, such as the use of fragranced soaps or harsh intimate wash products, can disturb the vaginal microbiome and increase susceptibility. Sexual activity with new or multiple partners is commonly associated with a higher risk of developing BV. Men do not develop BV, but maintaining good sexual hygiene is still advisable.