Unusual Vaginal Smell

A noticeable change in vaginal odour—such as fishy or unpleasant—may occur alone or with symptoms like altered discharge, itching, irritation, or discomfort, depending on the cause.

Yes, a change in odour may occur on its own, particularly with conditions like bacterial vaginosis. However, persistent or unusual changes should be assessed.

Vaginal odour itself has no visible appearance but may be associated with changes in discharge, such as colour, consistency, or amount, which can help indicate the cause.

Changes in vaginal odour can affect anyone with a vagina. Common contributing factors include bacterial imbalance, hormonal changes, hygiene practices, and, less commonly, infections.

Most causes are mild and easily treated. In some cases, untreated infections (such as bacterial vaginosis or certain STIs) may increase the risk of complications, including pelvic inflammatory disease.

However, this is not common, and risk depends on the underlying cause.

Changes in vaginal odour can develop suddenly or gradually, depending on the cause. Infections may cause more rapid changes, while hormonal or lifestyle factors may lead to gradual variation.

The most common cause is bacterial vaginosis, a change in the normal vaginal bacteria that can produce a fishy odour.

Other causes include retained foreign bodies (such as a tampon) and infections such as trichomoniasis.

Yeast infections typically cause itching and discharge rather than a strong odour.

Less common causes might include hormonal changes, especially during menopause, certain medications or supplements, and medical conditions like diabetes or a rectovaginal fistula. Sometimes, a genetic disorder called trimethylaminuria, which affects how the body breaks down certain compounds, can lead to a fishy odor.

Factors that may increase the likelihood include:

• Douching, which disrupts normal vaginal flora
• New or multiple sexual partners (associated with bacterial imbalance)
• Use of perfumed products or irritants
• Wearing non-breathable or tight clothing

Not all cases are related to sexual activity or hygiene.

Severity depends on the underlying cause. Untreated infections or retained foreign bodies may lead to more noticeable or persistent odour.

Environmental factors such as heat or sweating may temporarily make odour more noticeable but do not usually worsen the underlying condition.

Avoid douching and scented products, which can disrupt normal vaginal balance. Wash the external genital area with water or a mild, non-perfumed cleanser if needed.

Wear breathable underwear and change out of wet clothing promptly. Use condoms where appropriate and seek advice if symptoms persist or recur.

Assessment usually starts with a clinical history and, where appropriate, a pelvic examination. This may include discussion of symptoms, menstrual cycle, sexual history, and any recent changes (e.g. products, hygiene, or medications).

The aim is to identify whether the cause is a common condition such as bacterial vaginosis, a retained foreign body, or an infection.

Vaginal swabs are the main tests used to identify the cause. These can detect bacterial vaginosis, trichomoniasis, and other infections.

In some settings, additional tests such as vaginal pH assessment or microscopy may be used, but laboratory testing is generally more reliable.

Providing a clear history of symptoms, including when the odour started and any associated discharge or irritation, helps guide diagnosis.

Timing in relation to the menstrual cycle and any recent changes (e.g. new products or partners) may also be relevant.

Yes, other conditions can be confused with vaginal causes. For example, urinary tract infections, poor perineal hygiene, or gastrointestinal sources (rarely) may contribute to perceived odour.

A clinical assessment helps distinguish between these possibilities.

Further investigation is not usually required. In selected cases, additional tests may be considered if symptoms are persistent, atypical, or not responding to initial treatment.

Examination may provide useful clues, particularly if discharge or a retained foreign body is present.

However, swab testing is often needed to confirm the cause and guide appropriate treatment.

You may notice a change in odour, but identifying the cause at home is difficult.

If symptoms persist or are concerning, clinical assessment is recommended to ensure appropriate management.

Yes, most causes of unusual vaginal odour can be effectively managed once the underlying cause is identified. Assessment helps guide appropriate treatment.

The treatment for an unusual vaginal smell varies depending on the cause. Common treatments include prescribed antibiotics or antifungal medications for infections like bacterial vaginosis or yeast infections. For non-infectious causes, recommendations might include lifestyle changes such as improved hygiene practices or adjustments in diet.

Treatment duration depends on the cause.

For bacterial vaginosis or trichomoniasis, treatment is usually a short course of antibiotics (typically 5–7 days or single-dose regimens).

Symptoms often improve within a few days, although recurrence can occur.

Most causes resolve with appropriate treatment.

However, some conditions, particularly bacterial vaginosis, may recur and require further management.

Partner treatment is only required in certain cases.

Trichomoniasis requires treatment of sexual partners
Bacterial vaginosis does not usually require partner treatment

If a sexually transmitted infection is diagnosed, partner notification and treatment are important to prevent reinfection.

The long-term outlook is generally very good. Most causes of unusual vaginal odour are easily treated once identified.

Some conditions, particularly bacterial vaginosis, may recur and require further management.

No, treatment does not prevent recurrence.

The likelihood of symptoms returning depends on the underlying cause. For example, bacterial vaginosis can recur even after appropriate treatment due to changes in vaginal flora, rather than hygiene.

Some measures may help reduce recurrence:

• Avoid douching and scented products
• Use non-perfumed cleansers externally if needed
• Wear breathable underwear
• Use condoms where appropriate

Recurrence can still occur despite these measures, particularly with bacterial vaginosis.

There is no requirement to inform a partner if symptoms are not caused by a sexually transmitted infection.

If an STI is identified (e.g. trichomoniasis), partner notification and treatment are important to prevent reinfection.

Changes in vaginal odour during pregnancy are usually not harmful in themselves. However, they may indicate an underlying condition.

For example, bacterial vaginosis in pregnancy has been associated with an increased risk of certain complications, such as preterm birth. Because of this, persistent or unusual symptoms should be assessed.

Changes in vaginal discharge and scent are common during pregnancy due to hormonal changes.

However, a strong or persistent unpleasant odour is not considered typical and should be evaluated to exclude infection or other causes.

Treatment depends on the underlying cause.

• Bacterial vaginosis and trichomoniasis can be treated with pregnancy-safe antibiotics
• Yeast infections are treated with antifungal medications
• Retained foreign bodies require removal

Self-treatment is not recommended. Management should be guided by a healthcare professional to ensure safety.

Avoid douching and scented products, which can disrupt normal vaginal flora.

Wear breathable underwear and seek medical advice if symptoms develop or persist. Routine antenatal care will help identify and manage any concerns.

Vaginal odour itself does not affect breastfeeding.

If caused by an untreated infection, symptoms may persist postpartum and should be managed appropriately, but this does not usually impact recovery or feeding.