Last updated: 9 September 2026 | Medically reviewed by: The GPCarely Clinical Review Team | Reading level: General audience

If you're dealing with unusual vaginal discharge, odour, or itching and trying to work out whether it's bacterial vaginosis (BV) or a yeast infection, you're not alone — these two conditions are among the most commonly confused vaginal health issues. While they can share a few overlapping symptoms, there are clear signs that help distinguish BV vs yeast, and knowing them can save you from using the wrong treatment. This article breaks down the fastest ways to tell them apart and what to do if you're still not sure.

The Fastest Way to Tell Them Apart: Discharge and Smell

The two most reliable signs for distinguishing BV from a yeast infection are the texture of the discharge and whether there's an odour.

• BV typically produces a thin, watery, greyish-white discharge with a noticeable fishy smell, which is often more pronounced after sex or during your period.
• Yeast infections typically produce a thick, white discharge often described as looking like cottage cheese, usually with little to no odour.

If you're noticing a strong fishy smell, BV is the more likely cause. If odour is minimal but itching is intense, a yeast infection is more likely.

Itching: A Key Differentiator

Itching is one of the clearest distinguishing symptoms. Yeast infections usually cause significant itching and irritation around the vulva, sometimes accompanied by redness and swelling. BV, on the other hand, often causes little to no itching at all — many people with BV describe only the discharge and odour, without significant irritation.

If itching is a dominant symptom, a yeast infection is statistically more likely than BV, though this isn't a substitute for a proper diagnosis, particularly if symptoms are new or unusual for you.

Side-by-Side Comparison

Symptom BV Yeast Infection Discharge texture Thin, watery Thick, clumpy ("cottage cheese") Discharge colour Greyish-white White Odour Fishy, often stronger after sex Mild or absent Itching Usually mild or absent Often significant Burning during urination Occasionally Common Cause Bacterial imbalance Fungal (Candida) overgrowth

Why It's Easy to Get This Wrong

Symptom overlap is the main reason self-diagnosis is unreliable. Some people with BV experience mild itching, and some yeast infections present with minimal odour, which blurs the lines that usually help distinguish the two. Research on self-diagnosed vaginal infections consistently shows that a meaningful proportion of people using over-the-counter yeast infection treatments actually have BV or another condition entirely, which means the treatment doesn't work and symptoms persist or return.

Part of the confusion also comes from how differently these conditions can present from person to person. Not everyone with BV notices a strong odour right away, and not everyone with a yeast infection has intense itching — mild cases of either condition can present with subtle symptoms that are harder to categorise using a simple checklist. This is one of the reasons healthcare providers rely on more than just a symptom description when a diagnosis needs to be confirmed, particularly for recurring or unusual cases.

For a more detailed breakdown of causes, risk factors, and treatment options for each condition — including information on thrush in men — see our full guide to BV vs yeast infection.

What Causes Each Condition

Understanding what triggers BV or a yeast infection can also help you identify which is more likely in your situation:

BV is more commonly triggered by:

• Changes in vaginal pH, often linked to sexual activity or douching
• New or multiple sexual partners
• Use of scented soaps, washes, or vaginal products
• Smoking, which has been associated with a higher risk of BV in some studies

Yeast infections are more commonly triggered by:

• Recent antibiotic use, which reduces protective bacteria and allows yeast to overgrow
• Hormonal changes, including pregnancy or hormonal contraceptives
• Uncontrolled blood sugar or diabetes
• Tight, non-breathable clothing that creates a warm, moist environment

If your symptoms started shortly after a course of antibiotics, a yeast infection becomes more likely. If they developed after a new sexual partner or using a new personal care product, BV becomes a more probable explanation.

What to Do If You're Not Sure

If you've tried an over-the-counter treatment and symptoms haven't improved within the expected timeframe, or if this is your first time experiencing these symptoms, it's worth getting a proper assessment rather than guessing again. A doctor can often confirm the diagnosis through a description of your symptoms and, when needed, a simple swab test, removing the uncertainty involved in self-diagnosis.

When Self-Treatment Isn't Appropriate

Certain situations call for professional assessment rather than an over-the-counter approach:

• Symptoms persist after a full course of treatment
• You're pregnant
• Symptoms recur frequently (several times a year)
• You notice pelvic pain, fever, or unusual bleeding alongside discharge changes
• This is your first suspected episode of either condition

How an Online Consultation Can Help

An online GP consultation can help you describe your symptoms, discuss your history, and get guidance on likely diagnosis and treatment, often without needing to visit a clinic in person for an initial assessment. In many cases, a doctor can prescribe appropriate treatment directly if the clinical picture is clear. You can arrange this through our women's health service or book an online appointment.

When It Might Be Something Else Entirely

Not all vaginal discharge, odour, or itching is BV or a yeast infection. Sexually transmitted infections such as trichomoniasis, chlamydia, or gonorrhoea can cause similar symptoms, including unusual discharge and discomfort, and require different testing and treatment altogether. Skin conditions like eczema or contact dermatitis can also cause vulvar itching without any infection being present at all. This is another reason that repeated self-treatment without improvement is a signal to get a proper assessment rather than trying a different over-the-counter product.

Preventing Recurrence

Whether you've had BV, a yeast infection, or both, a few general habits can reduce the likelihood of recurrence:

• Avoid douching and scented feminine hygiene products, which can disrupt the natural vaginal microbiome
• Wear breathable, cotton underwear and avoid staying in wet clothing (like swimwear) for extended periods
• Wipe front to back after using the toilet to avoid introducing bacteria
• If you're prone to yeast infections after antibiotics, mention this to your doctor, as some may recommend preventive antifungal treatment alongside a course of antibiotics
• Manage underlying conditions like diabetes, which can increase susceptibility to yeast infections

None of these steps guarantee prevention, but they reduce risk factors that are within your control.

Frequently Asked Questions

Can I have BV and a yeast infection at the same time? Yes, it's possible to have both conditions simultaneously, which can make symptoms more confusing and is another reason a proper assessment is useful if self-treatment isn't resolving things.

Does a fishy smell always mean BV? A fishy odour is a strong indicator of BV, but it's not the only cause of unusual vaginal odour. If symptoms don't fit the typical pattern, a professional assessment can clarify what's actually happening.

Is it safe to try an over-the-counter yeast infection treatment first? If your symptoms clearly match a yeast infection (thick discharge, minimal odour, significant itching) and this isn't your first episode, trying an appropriate over-the-counter antifungal is reasonable. If symptoms don't improve within a few days, or if you're unsure which condition you have, seeing a doctor is a better next step.

Can stress cause BV or yeast infections? Stress can indirectly affect immune function and hormonal balance, which may contribute to conditions that allow yeast or bacterial imbalances to develop, though it's rarely the sole cause.

Conclusion

The clearest signs for telling BV and yeast infections apart are discharge texture, odour, and the presence or absence of itching — but because symptoms can overlap, self-diagnosis isn't always accurate, particularly for a first episode or recurring symptoms. When in doubt, a proper assessment removes the guesswork and gets you on the right treatment faster. For a deeper look at causes, treatment, and thrush in men, read our full guide to BV vs yeast infection.

This article provides general health information and is not a substitute for individual medical advice. Vaginal symptoms can have multiple causes, and a clinician may need to assess your specific situation. If you have severe symptoms, are pregnant, or symptoms don't improve with treatment, consult a qualified healthcare professional. In an emergency, contact your local emergency services.

Content on this page is reviewed periodically by the GPCarely clinical team for accuracy against current general practice guidance and is updated when relevant medical information changes.

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