Vaginal Candidiasis (Thrush)

Vaginal candidiasis (thrush) is usually diagnosed through:

• A discussion of your symptoms
• A genital examination
• A vaginal swab test (if needed)

Your clinician will ask about itching, soreness, discharge, recent antibiotics, hormonal changes, or recurrent episodes. On examination, typical signs include redness, swelling, and thick white discharge.

If confirmation is required, a small swab is taken from the vagina and sent to the laboratory for testing.

If testing is needed, the following may be used:

• Vaginal swab – examined under a microscope or cultured to identify Candida
• PCR testing – detects yeast DNA, useful in recurrent or treatment-resistant cases
• Vaginal pH testing – thrush usually occurs with a normal pH, helping distinguish it from bacterial vaginosis

Testing for other infections may also be recommended if symptoms are unclear.

An accurate diagnosis depends on:

• A clear description of symptoms
• Medical history (e.g. antibiotics, pregnancy, diabetes)
• Physical examination findings
• Laboratory confirmation when necessary

Because several conditions can cause similar symptoms, swab testing improves diagnostic accuracy, particularly in recurrent or persistent cases.

Yes. Several conditions can mimic thrush, including:

• Bacterial vaginosis
• Contact dermatitis (irritation from products)
• Lichen sclerosus or other vulval skin conditions
• Trichomoniasis
• Cytolytic vaginosis

These conditions require different treatment, which is why persistent or unusual symptoms should be assessed clinically.

Sometimes. In straightforward cases with typical symptoms, a clinician may make a working diagnosis based on examination.

However, because symptoms overlap with other conditions, a swab test is often recommended—particularly if symptoms are recurrent, severe, or not responding to treatment.

It can be difficult to diagnose thrush accurately at home, as symptoms overlap with other infections.

Pharmacy pH self-tests may provide guidance, but they do not confirm Candida. If this is your first episode, symptoms feel different, or treatment has not worked, a professional assessment is recommended to ensure the correct diagnosis and treatment.

Vaginal candidiasis (thrush) commonly causes:

• Persistent itching and soreness around the vulva
• Thick, white, odourless discharge (often described as “cottage cheese”)
• Stinging when passing urine
• Discomfort or pain during sex
• Redness, swelling, or small cracks in the skin

These symptoms can overlap with other conditions, so an assessment is recommended if you are unsure.

Yes. Candida can be present in the vagina without causing irritation. This is known as colonisation rather than an active infection.

Around 20% of women may carry Candida without symptoms. In these cases, treatment is not required unless itching, soreness, or abnormal discharge develops.

Typical visible signs include:

• Thick, white, odourless discharge
• Redness and swelling of the vulva
• Irritated or shiny-looking skin
• Occasionally small red spots or tiny cracks

It is usually accompanied by itching or stinging.

Vaginal Candidiasis primarily affects women and people with a vagina. Around 75% will experience it at least once.

It is more common:

• During the reproductive years
• In pregnancy (due to hormonal changes)
• After taking antibiotics
• In people with poorly controlled diabetes
• In those with weakened immune systems

Vaginal Candidiasis is not classified as a sexually transmitted infection, although symptoms can sometimes be triggered by sex.

Vaginal Candidiasis is usually mild, but untreated symptoms may lead to:

• Severe irritation and cracked skin
• Secondary bacterial infection
• Recurrent thrush (four or more episodes per year)
• Ongoing discomfort during daily activities or sex

In pregnancy, thrush can occasionally be passed to a baby during delivery, causing oral thrush. Serious bloodstream infection is extremely rare and typically only a concern in people with severely weakened immune systems.

Vaginal Candidiasis does not have a fixed incubation period because Candida is often already present in the body. Symptoms develop when the vaginal balance is disrupted, allowing yeast to overgrow.

This can happen within a few days of a trigger, such as:

• Antibiotics
• Hormonal changes (pregnancy or menstrual cycle)
• Poorly controlled diabetes

Vaginal Candidiasis is common during pregnancy due to hormonal changes that make yeast overgrowth more likely.

It does not harm the developing baby during pregnancy. If an infection is present at delivery, there is a small chance the baby may develop oral thrush or nappy rash, both of which are common and treatable.

The main consideration during pregnancy is choosing safe treatment.

Vaginal Candidiasis is very common in pregnancy. Increased oestrogen levels change the vaginal environment, making yeast growth more likely.

Some people experience it for the first time during pregnancy, while others may notice more frequent episodes.

During pregnancy, treatment usually involves:

• Antifungal vaginal pessaries
• External antifungal creams

These topical treatments are considered safe because very little medication is absorbed into the bloodstream.

Oral antifungal tablets (such as fluconazole) are generally avoided during pregnancy as a precaution.

It is important to confirm the diagnosis with a healthcare professional before starting treatment.

To reduce risk:

• Wear loose, breathable cotton underwear
• Avoid tight synthetic clothing
• Use plain water or fragrance-free emollients for washing
• Avoid scented products and douching
• Wipe from front to back after using the toilet
• Maintain good blood sugar control if you have gestational diabetes

If symptoms develop, seek professional advice before using medication.

Vaginal Candidiasis can make postpartum recovery more uncomfortable, particularly if you are healing from tears or stitches.

It does not affect breast milk itself. However, Candida can sometimes infect the nipples, causing pain, redness, or burning during feeds. Babies may develop oral thrush, and in such cases both parent and baby are usually treated together to prevent reinfection.

Topical antifungal treatments are generally compatible with breastfeeding, but clinical advice should always be sought to ensure safe and appropriate management.

The long-term prognosis for Vaginal Candidiasis is very good. Most episodes resolve completely within a few days of starting antifungal treatment and do not cause permanent damage or long-term reproductive health problems.

Some people experience recurrent Vaginal Candidiasis, defined as four or more episodes in one year. Although this can affect quality of life, it is manageable. Longer maintenance treatment programmes are often effective in preventing further episodes.

Identifying triggers such as antibiotics, hormonal changes, or poorly controlled diabetes can also help reduce recurrence.

No. Treating an episode does not provide immunity.

Candida naturally exists in the body, so Vaginal Candidiasis can recur if the vaginal environment becomes disrupted. Common triggers include antibiotics, hormonal fluctuations, and underlying health conditions such as diabetes.

If infections occur frequently, further assessment may be helpful to confirm the diagnosis and discuss longer-term management.

To help prevent recurrence:

• Avoid scented soaps, bubble baths, and vaginal deodorants
• Wash with plain water or a fragrance-free emollient
• Wear loose, breathable cotton underwear
• Avoid prolonged damp or tight clothing
• Wipe from front to back after using the toilet
• Keep blood sugar well controlled if you have diabetes

If you experience four or more episodes per year, a longer treatment plan may be recommended.

Vaginal Candidiasis is not classified as a sexually transmitted infection, so there is no medical requirement to inform your partner.

Partners do not usually need treatment unless they develop symptoms such as redness, itching, or irritation of the genital area. Some people choose to discuss it with their partner for reassurance, particularly if symptoms occur around sexual activity.

If infections are recurrent or causing concern, a clinical review can help guide appropriate management.

Vaginal candidiasis (thrush) is caused by an overgrowth of Candida, a yeast that normally lives in the vagina without causing harm.

Common triggers include:

• Antibiotics, which reduce protective bacteria
• Hormonal changes (pregnancy, menstrual cycle, hormonal contraception)
• Poorly controlled diabetes
• Weakened immune system
• Genital irritation from scented products or harsh cleansers
• Tight, non-breathable clothing that traps moisture

Thrush develops when the natural vaginal balance is disrupted, allowing yeast to multiply.

No. Thrush is not caused by sexually transmitted infections and is not classified as an STI.

However, some STIs can cause symptoms similar to thrush (such as discharge or irritation), which is why testing may be recommended if the diagnosis is uncertain.

Higher levels of oestrogen increase the likelihood of thrush because they raise glycogen (sugar) levels in vaginal tissue, which yeast feeds on.

Hormonal triggers include:

• Pregnancy
• The days before a period
• The combined oral contraceptive pill
• Hormone replacement therapy (HRT)

Some people notice thrush recurring at the same point in their cycle.

Thrush is not directly caused by another gynaecological disease. However, certain conditions can increase susceptibility, including:

• Pregnancy
• Poorly controlled diabetes
• Conditions associated with higher oestrogen levels
• Chronic vulval skin conditions that cause irritation

Because symptoms overlap with conditions such as bacterial vaginosis or inflammatory skin disorders, assessment is advised if treatment is not working.

Urological conditions do not directly cause thrush. However:

• Poorly controlled diabetes increases risk
• Repeated antibiotic treatment for urinary tract infections (UTIs) can trigger yeast overgrowth

If urinary symptoms and vaginal symptoms occur together, a clinical review is helpful to distinguish the cause.

Skin conditions, such as Lichen sclerosus, Lichen planus, and Chronic dermatitis, do not cause thrush, but they can damage the skin barrier and increase vulnerability to infection. They can also mimic thrush symptoms, making proper diagnosis important.

Lifestyle-related triggers include:

• Scented soaps, bubble baths, wipes, or douching
• Tight synthetic underwear or prolonged damp clothing
• Frequent antibiotic use
• High stress levels
• Poor blood sugar control

These factors can disrupt the natural vaginal balance and encourage yeast growth.

Risk is higher with:

• Antibiotic use
• Pregnancy or high-oestrogen states
• Diabetes
• Immune suppression
• Recurrent irritation of the vulval skin

People who experience four or more episodes per year may have recurrent thrush and benefit from a longer treatment plan.

To help prevent thrush:

• Avoid scented or harsh genital products
• Use plain water or fragrance-free emollients for washing
• Wear loose, breathable cotton underwear
• Change out of wet clothing promptly
• Keep diabetes well controlled
• Be aware of symptoms during or after antibiotics

If symptoms are frequent or severe, further assessment may be needed to identify underlying triggers.

Yes. Vaginal Candidiasis is usually straightforward to treat with antifungal medication.

Treatment is available over the counter, but a clinical assessment is recommended if this is your first episode, symptoms are severe, or infections are recurring. In persistent cases, further testing may be required to confirm the diagnosis and guide a tailored treatment plan.

Treatment involves antifungal medication, including:

• Oral tablet (e.g. fluconazole)
• Vaginal pessary (e.g. clotrimazole)
• Topical antifungal cream for external irritation
• Most uncomplicated infections resolve with a short course.
• For recurrent Vaginal Candidiasis (four or more episodes per year), a longer treatment regimen may be recommended.

Supportive measures such as avoiding scented products and wearing breathable cotton underwear may also help reduce irritation.

Treatment duration depends on the type used:

• A single oral tablet often works within a few days, though symptoms may take up to a week to fully settle.
• Pessaries or creams are typically used for 1–6 days.
• Recurrent or severe cases may require extended treatment, sometimes with maintenance therapy over several months.

If symptoms persist beyond two weeks, reassessment is advised.

Yes, individual episodes can be fully cleared with appropriate antifungal treatment.

However, because Candida naturally exists in the body, Vaginal Candidiasis can recur if the vaginal balance is disrupted (for example, by antibiotics or hormonal changes).

Frequent recurrences should be clinically reviewed to confirm the diagnosis and consider longer-term management options.

Vaginal Candidiasis is not classified as a sexually transmitted infection.

Partners do not usually require treatment unless they are experiencing symptoms, such as genital irritation or redness.

If infections are recurrent, further clinical assessment may be helpful to rule out contributing factors.