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Bacterial vaginosis treatment

List of topics

• What is bacterial vaginosis?<
• Symptoms and how BV differs from other conditions<
• Diagnosis<
• Treatment options<
• Safety and suitability<
• Recurrent BV<
• BV in pregnancy and red flags<
• Self-care and prevention<
• How DoktorABC works<
• Summary<

What is bacterial vaginosis?

Bacterial vaginosis (BV) is one of the most common vaginal conditions affecting women of reproductive age. It occurs when the natural balance of bacteria in the vagina changes, with certain bacteria becoming more dominant and others, including the beneficial Lactobacillus species that help maintain a healthy vaginal environment, becoming less prevalent.

BV is not caused by poor hygiene. The vagina has its own carefully balanced ecosystem, and BV reflects a disruption to that balance rather than a failure of cleanliness. It is also not automatically classified as a sexually transmitted infection, although sexual activity is one of several factors associated with changes in vaginal bacterial balance.

Around half of people with BV have no symptoms at all, which means many cases go undetected and resolve without treatment. When symptoms are present, however, treatment is usually recommended.

Symptoms and how BV differs from other conditions

When BV does cause symptoms, the most commonly reported are:

• An unusual vaginal discharge that is typically thin, watery, and grey or white in colour
• A strong, fishy smell, which is often more noticeable after sex
• In some cases, a general sense of vaginal discomfort

BV does not usually cause significant itching, soreness, or redness. This is an important distinction from vaginal thrush, which typically causes itching and a thick, white, odourless discharge.

Diagnosis

BV is diagnosed following an assessment of your symptoms, vaginal history, and, where appropriate, a vaginal swab. The swab is sent to a laboratory to confirm the bacterial changes associated with BV and to rule out other infections, including STIs, that can cause similar symptoms.

A GP or sexual health clinic can carry out this assessment. Sexual health clinics are particularly well placed to assess BV alongside testing for other conditions and do not require a GP referral. Home testing kits for BV are also available, though a clinical assessment remains the most reliable way to confirm the diagnosis and rule out other causes of symptoms.

If this is your first episode of BV, if symptoms are unusual or more severe than before, or if you have recently had a new sexual partner, a clinical assessment is the appropriate first step rather than self-treatment.

Treatment options

BV is treated with antibiotics, which are prescription-only medicines in the UK. Treatment is available in two main forms, oral antibiotic tablets and topical antibiotic gels or creams applied inside the vagina.

The most appropriate treatment for your individual circumstances is determined by a prescriber following an assessment. Do not attempt to select or obtain an antibiotic without a clinical assessment, as treatment choice depends on factors including your medical history, any allergies, current medicines, and whether you are pregnant.

Safety and suitability

BV antibiotics are not appropriate for everyone without consideration of individual circumstances. The following factors are relevant to safe prescribing.

• Alcohol: Oral metronidazole must not be taken alongside alcohol, and alcohol should be avoided for at least 48 hours after completing a course. Combining metronidazole with alcohol can cause an unpleasant reaction including nausea, flushing, and palpitations. This restriction does not apply in the same way to metronidazole vaginal gel, though it is still advisable to check the patient information leaflet for the specific product prescribed.
• Pregnancy: BV in pregnancy can carry risks and should always be assessed by a GP or midwife. Treatment options in pregnancy are determined by a clinician, as not all antibiotic options are suitable at all stages of pregnancy. Do not self-treat BV during pregnancy.
• Breastfeeding: Some BV treatments may not be suitable while breastfeeding. Speak to a prescriber or pharmacist before starting treatment.
• Latex contraception: Clindamycin vaginal cream can damage latex condoms and diaphragms, reducing their effectiveness. Alternative contraception should be used during treatment and for a period afterwards. Check the PIL for the specific product you are prescribed.
• Allergies: If you have a known allergy to metronidazole, clindamycin, or any other component of a BV treatment, inform your prescriber before starting treatment.
• Liver conditions: Metronidazole is processed by the liver. People with significant liver disease may require dose adjustment or an alternative treatment. Inform your prescriber of any liver conditions.
• Previous treatment: If you have recently been treated for BV and symptoms have returned, inform your prescriber. Repeated or recent antibiotic treatment is relevant to the choice of current management.

Recurrent BV

Recurrence of BV within weeks or months of completing treatment is common and does not necessarily indicate treatment failure or a new infection. However, repeated episodes warrant reassessment rather than repeated self-treatment.

A clinical review for recurrent BV can help identify whether any modifiable factors, such as hygiene practices, contraceptive methods, or sexual activity patterns, may be contributing to recurrence, and whether a longer or alternative treatment regimen is appropriate. BASHH guidance describes specific longer-course regimens for people with frequent recurrences, which are determined by a clinician rather than self-managed.

A note on home remedies and supplements

Various home remedies are discussed online in relation to BV, including probiotic supplements, yoghurt, and boric acid. The evidence for these approaches in treating or preventing BV is currently limited, and some carry safety concerns. Boric acid in particular is toxic if ingested and should never be used internally without specific medical guidance. None of these approaches should be used as a substitute for antibiotic treatment confirmed through clinical assessment.

Partners, sex and STI risk

BV is not classified as an STI, but sexual activity is associated with changes in vaginal bacterial balance and can be a trigger for BV episodes in some people. Having a new sexual partner, or frequent changes in sexual partners, has been associated with a higher likelihood of BV.

Routine treatment of male sexual partners is not currently recommended, as evidence does not support this reducing the likelihood of recurrence. The position for female sexual partners is less clear and may be discussed with a clinician on an individual basis.

If you have BV and have had a new sexual partner, or if there is any other reason to suspect a possible STI alongside BV, testing is recommended. A sexual health clinic can assess for both BV and STIs at the same appointment.

BV in pregnancy and red flags

If you are pregnant and notice a change in vaginal discharge or any other vaginal symptoms, contact your GP or midwife rather than attempting to self-treat. BV during pregnancy has been associated with a risk of complications including preterm birth, and assessment and treatment should always be clinician-led in this context.

Seek prompt medical attention if you experience any of the following alongside vaginal symptoms, regardless of whether you think they may be due to BV.

• Pelvic or lower abdominal pain
• Fever or feeling generally unwell
• Bleeding that is not your normal period
• Sores, ulcers, or blisters in the vaginal area
• Pain during sex
• Urinary symptoms such as pain when urinating or increased frequency
• Symptoms suggesting a possible STI

These symptoms require clinical assessment and should not be managed with over-the-counter or online treatment alone.

Self-care and prevention

While there is no guaranteed way to prevent BV, the following measures are associated with maintaining vaginal health and reducing the likelihood of disrupting the natural bacterial balance.

• Wash the external genital area gently with plain, unperfumed water. Avoid soap, shower gel, bubble bath, douches, or vaginal deodorants inside or around the vagina.
• Avoid antiseptic products or washes in the vaginal area.
• Avoid douching. Douching disrupts the natural vaginal environment and has been associated with a higher likelihood of BV.
• Shower rather than bathe where possible if BV is recurrent.
• Use condoms, which may help reduce changes in vaginal bacterial balance associated with semen exposure.

BV is a common condition that reflects a change in bacterial balance rather than a personal failing. Seeking straightforward clinical support when needed is the most helpful approach.

How DoktorABC works

DoktorABC UK is a digital health platform that connects patients with independent, UK-registered healthcare professionals through a secure online process.

• Complete a short medical questionnaire covering your symptoms, medical history, and any relevant medicines.
• An independent UK-registered prescriber reviews your information and determines whether treatment is clinically appropriate for you.
• If treatment is considered suitable, a prescription is issued by the UK-registered prescriber in accordance with UK regulations.
• Your medication is dispensed by a GPhC-registered pharmacy and delivered to your door.

DoktorABC UK does not itself provide medical care, issue prescriptions, or dispense medicines. All clinical decisions are made by the independent prescribing healthcare professional following an individual assessment.

Summary

Bacterial vaginosis is a common condition caused by a change in the natural balance of vaginal bacteria, not by poor hygiene. Around half of people with BV have no symptoms. When symptoms are present, the most typical signs are a thin, grey-white discharge and a fishy smell. BV is treated with prescription antibiotics, most commonly metronidazole or clindamycin, available as oral tablets or vaginal preparations. Recurrence is common and warrants clinical review rather than repeated self-treatment. A UK-registered prescriber can assess your individual circumstances and advise on the most appropriate treatment for you.