Vaginal Yeast Infection: Symptoms, Causes, Treatment and Prevention

A vaginal yeast infection, medically known as vulvovaginal candidiasis (VVC), is a common fungal condition affecting the vagina and vulva.

It occurs when Candida yeast, which can normally live in the vagina without causing problems, grows excessively and causes inflammation and symptoms.

Candida albicans is the most common cause, although other Candida species can sometimes be responsible.

Vaginal yeast infections are common and usually treatable, but itching, burning and vaginal discharge are not unique to yeast infections. Other conditions can produce very similar symptoms.

For this reason, especially with a first episode or unusual symptoms, getting the correct diagnosis is important.

Is Candida Normally Present in the Vagina?

Yes.

Some healthy people have small amounts of Candida in the vagina without experiencing any symptoms.

The vagina contains a natural community of microorganisms known as the vaginal microbiome.

Having Candida present does not automatically mean someone has an infection.

Treatment is generally needed when overgrowth causes symptoms and vulvovaginal candidiasis is appropriately diagnosed.

What Causes a Vaginal Yeast Infection?

Vaginal yeast infections occur when conditions allow Candida to multiply excessively.

The balance of microorganisms in the vagina can be affected by factors such as:

• antibiotics,
• hormonal changes,
• pregnancy,
• diabetes,
• and weakened immune defences.

However, many otherwise healthy people who develop an uncomplicated yeast infection have no obvious triggering factor.

Having a yeast infection therefore does not necessarily mean that someone has poor hygiene or another disease.

Antibiotics and Yeast Infections

Antibiotics are an important risk factor.

The vagina normally contains bacteria that help maintain its natural environment.

Broad-spectrum antibiotics can reduce some of these bacteria, allowing yeast to multiply more easily.

This does not mean antibiotics should be avoided when they are medically necessary.

Take antibiotics only when appropriately prescribed and follow the instructions given by your healthcare professional.

Do not stop a prescribed antibiotic simply because you are concerned about developing a yeast infection.

Pregnancy and Yeast Infections

Hormonal changes during pregnancy can increase susceptibility to vulvovaginal candidiasis.

Pregnant people should seek appropriate medical or maternity advice before treating suspected vaginal infections because treatment recommendations can differ during pregnancy.

In particular, medicines that are appropriate for a nonpregnant adult may not be the preferred treatment during pregnancy.

Do not assume that every episode of discharge during pregnancy is a yeast infection.

Changes in vaginal discharge can occur normally during pregnancy, while infections and other conditions can also cause abnormal discharge.

Diabetes

Poorly controlled diabetes can increase the risk of vaginal yeast infections.

Persistently high blood glucose can create conditions that favour yeast overgrowth and may also affect immune function.

Recurrent or difficult-to-treat yeast infections can sometimes be associated with poorly controlled diabetes.

Someone experiencing recurrent infections along with symptoms such as:

• excessive thirst,
• frequent urination,
• unexplained weight loss,
• or unusual tiredness

should discuss these symptoms with a healthcare professional.

Weakened Immune System

Conditions or medicines that weaken immune function can increase the risk of complicated or recurrent candidiasis.

Examples may include:

• certain immune-suppressing medicines,
• some cancer treatments,
• advanced or uncontrolled HIV infection,
• and other significant immune disorders.

People who are immunocompromised should seek professional advice for suspected vaginal infections rather than repeatedly self-treating.

Hormonal Factors

Changes in hormone levels can influence the vaginal environment.

Yeast infections may occur more frequently during periods of hormonal change, including:

• pregnancy,
• parts of the menstrual cycle,
• and use of certain hormonal contraceptives.

However, hormones are only one potential factor, and not everyone experiencing hormonal changes develops candidiasis.

Is Poor Diet a Cause of Vaginal Yeast Infection?

The old version of this article listed “poor diet or nutrition” as a major cause.

That is too simplistic.

There is no established special “Candida diet” that has been proven to prevent or cure ordinary vulvovaginal candidiasis.

A balanced diet is important for general health, but restrictive diets marketed as ways to “starve Candida” should not replace evidence-based treatment.

People with diabetes should focus particularly on appropriate blood-glucose management.

Does Lack of Sleep Cause Yeast Infections?

There is not good evidence that simply getting too little sleep directly causes a vaginal yeast infection.

Adequate sleep supports general health, but “inadequate sleep” should not be presented as an established direct cause of vaginal candidiasis.

Does Stress Cause Vaginal Yeast Infections?

Stress affects many aspects of health, but it is difficult to say that ordinary psychological stress directly causes vaginal candidiasis.

A person experiencing recurrent infections should receive appropriate assessment rather than assuming stress is the explanation.

Symptoms of a Vaginal Yeast Infection

Common symptoms include:

• intense vulvar or vaginal itching,
• burning,
• soreness,
• redness,
• swelling,
• and irritation.

Some people also experience:

• pain during sexual intercourse,
• burning or discomfort when urinating,
• and abnormal vaginal discharge.

Symptoms range from mild to severe.

What Does Yeast Infection Discharge Look Like?

A vaginal yeast infection may cause a:

• thick,
• white,
• lumpy,
• or curd-like discharge.

It is often described as resembling cottage cheese.

The discharge usually does not have a strong unpleasant odour.

However, discharge appearance alone cannot reliably diagnose the condition.

Some people with vaginal candidiasis have little or no noticeable change in discharge.

Is a Strong Fishy Smell Typical of a Yeast Infection?

No.

A strong fishy vaginal odour is not typical of vulvovaginal candidiasis.

A fishy smell is more commonly associated with conditions such as bacterial vaginosis (BV).

Other vaginal infections can also cause changes in discharge or odour.

Anyone with persistent unusual discharge, strong odour or uncertain symptoms should seek appropriate assessment.

Yeast Infection vs Bacterial Vaginosis

Yeast infection and bacterial vaginosis are different conditions.

Vaginal yeast infection

Usually involves Candida overgrowth.

Typical features include:

• significant itching,
• vulvar irritation,
• redness,
• soreness,
• and sometimes thick white discharge.

Bacterial vaginosis

BV involves an imbalance in vaginal bacteria.

It commonly causes:

• thin vaginal discharge,
• and a characteristic strong or fishy odour.

BV and candidiasis require different treatments.

Antifungal medicine treats candidiasis but does not treat bacterial vaginosis.

Yeast Infection vs Trichomoniasis

Trichomoniasis is caused by the parasite Trichomonas vaginalis and is a sexually transmitted infection (STI).

It can cause:

• vaginal irritation,
• abnormal discharge,
• discomfort during urination,
• and genital inflammation.

Symptoms can overlap with candidiasis.

Trichomoniasis requires different treatment and management.

Is a Vaginal Yeast Infection an STI?

Vulvovaginal candidiasis is not generally classified as a sexually transmitted infection.

It usually occurs because yeast already present in the body overgrows.

Sexual activity can sometimes contribute to symptoms, and Candida can occasionally be shared between sexual partners, but candidiasis is not managed like typical STIs such as:

• chlamydia,
• gonorrhoea,
• or trichomoniasis.

Routine treatment of sexual partners is generally unnecessary for uncomplicated vaginal candidiasis unless a partner develops symptoms or a healthcare professional recommends treatment.

Can Someone Get a Yeast Infection Without Having Sex?

Absolutely.

A person does not need to be sexually active to develop vulvovaginal candidiasis.

Yeast infections can occur in people who have never had sexual intercourse.

A diagnosis of vaginal candidiasis should therefore never be interpreted as evidence of sexual activity or infidelity.

How Is a Vaginal Yeast Infection Diagnosed?

Diagnosis may begin with questions about:

• symptoms,
• vaginal discharge,
• previous infections,
• recent antibiotic use,
• pregnancy,
• diabetes,
• sexual health,
• and medicines.

A healthcare professional may examine the vulva and vagina.

A sample of vaginal discharge may be examined under a microscope or sent for laboratory testing.

Testing is particularly useful when:

• the diagnosis is uncertain,
• symptoms are severe,
• infections keep returning,
• or treatment has failed.

Why Self-Diagnosis Can Be Difficult

Itching and discharge can have many causes.

Other possibilities include:

• bacterial vaginosis,
• trichomoniasis,
• sexually transmitted infections,
• irritation from personal-care products,
• skin conditions,
• allergic reactions,
• and hormonal changes.

Even someone who has previously had a yeast infection can occasionally mistake another condition for candidiasis.

Repeatedly using antifungal medication without confirming the cause can delay the correct diagnosis.

How Are Vaginal Yeast Infections Treated?

Vulvovaginal candidiasis is treated with antifungal medication.

Depending on the individual and local medical recommendations, treatment may include vaginal antifungal preparations such as:

• creams,
• pessaries,
• tablets,
• or suppositories.

Common antifungal medicines include azole drugs such as clotrimazole and miconazole.

An oral antifungal such as fluconazole may also be used in appropriate nonpregnant patients.

The best treatment depends on:

• severity,
• pregnancy,
• recurrence,
• the Candida species involved,
• other health conditions,
• and medicines being taken.

Can You Buy Yeast Infection Treatment Without a Prescription?

In many countries, certain vaginal antifungal treatments are available without a prescription.

However, availability varies internationally.

Self-treatment is more reasonable when a person:

• has previously had a professionally diagnosed yeast infection,
• recognizes the same typical symptoms,
• is not pregnant,
• does not have complicated medical conditions,
• and has no warning signs suggesting another condition.

If this is your first episode of vaginal symptoms, professional assessment is preferable.

Pregnancy and Antifungal Treatment

Pregnancy requires additional care.

Pregnant people with suspected candidiasis should discuss treatment with an appropriate healthcare professional.

Treatment recommendations during pregnancy can differ from those for nonpregnant adults.

Do not take oral fluconazole during pregnancy unless specifically instructed by an appropriately qualified healthcare professional who has considered your individual circumstances.

Topical azole treatment is commonly preferred during pregnancy.

What Is Recurrent Vulvovaginal Candidiasis?

Some people experience repeated yeast infections.

Recurrent vulvovaginal candidiasis is generally defined clinically as multiple symptomatic episodes within a year.

Repeated infections deserve professional assessment because management may differ from treatment of an occasional uncomplicated infection.

Possible contributing factors include:

• frequent antibiotic exposure,
• diabetes,
• immune-system problems,
• non-albicans Candida species,
• and other individual factors.

Sometimes no underlying cause is identified.

Why Recurrent Yeast Infections Need Testing

Most uncomplicated infections are caused by Candida albicans.

Recurrent or difficult-to-treat infections may sometimes involve other Candida species.

Some species respond differently to commonly used antifungal medicines.

Laboratory testing can therefore help determine:

• whether Candida is actually responsible,
• which species is present,
• and whether a different treatment strategy may be necessary.

Antifungal Resistance

Fungi can develop resistance to antifungal medicines.

This means some infections become harder to treat with medicines that previously worked.

Repeated unnecessary or inappropriate antifungal use may contribute to treatment problems.

If symptoms repeatedly return despite treatment, do not simply continue using the same product indefinitely.

Seek professional assessment.

Can Probiotics Cure a Vaginal Yeast Infection?

Probiotics are widely marketed for vaginal health.

However, they should not be considered a proven replacement for antifungal treatment of symptomatic vulvovaginal candidiasis.

Research into the vaginal microbiome continues, but evidence does not support relying on probiotic products alone to cure an established yeast infection.

What About Yogurt, Garlic and Other Home Remedies?

Home remedies such as inserting:

• yogurt,
• garlic,
• essential oils,
• herbal products,
• or other substances

into the vagina are sometimes promoted online.

These methods are not reliable substitutes for evidence-based antifungal treatment and can sometimes cause irritation or injury.

The vagina is self-cleaning and does not need these substances inserted into it.

Should You Douche?

No.

Douching is unnecessary and can disturb the normal vaginal environment.

Avoid putting water, antiseptics, fragrances or cleansing mixtures inside the vagina.

The vulva—the external genital area—can be gently cleaned with water.

Avoid harsh or heavily fragranced products if they cause irritation.

How Can You Reduce the Risk of Yeast Infections?

Not every vaginal yeast infection can be prevented.

Some people develop them despite having good hygiene and no obvious risk factors.

However, several practical measures may help reduce unnecessary irritation and conditions favourable to yeast overgrowth.

Use Antibiotics Appropriately

Do not use antibiotics for illnesses they cannot treat, such as ordinary viral colds.

When antibiotics are medically necessary, take them according to professional instructions.

People who repeatedly develop candidiasis after antibiotics can discuss this pattern with their healthcare professional.

Manage Diabetes

If you have diabetes, keeping blood glucose within the target range recommended by your healthcare team can reduce several infection-related risks.

Repeated candidiasis may sometimes indicate that diabetes needs better control.

Keep the Vulvar Area Comfortable and Dry

Breathable underwear and loose-fitting clothing can help reduce prolonged moisture and friction.

Change out of:

• wet swimwear,
• damp exercise clothes,
• or heavily perspired clothing

when practical.

This is about comfort and moisture management—not because having a yeast infection means someone is unclean.

Avoid Irritating Products

Products that may cause vulvar irritation include:

• scented intimate washes,
• vaginal deodorants,
• fragranced sprays,
• perfumed wipes,
• and some heavily scented bath products.

The vagina does not require perfumes or internal cleansing.

Is Cotton Underwear Necessary?

Cotton underwear is often recommended because it is breathable and can help manage moisture.

However, wearing a particular fabric does not guarantee prevention.

Comfortable, breathable clothing and changing out of damp garments are sensible approaches.

Do You Need to Wash Underwear in Very Hot Water?

The old article advised that underwear should be washed in hot water to prevent vaginal yeast infections.

That is not a standard requirement for preventing ordinary vulvovaginal candidiasis.

Regularly laundering underwear according to the manufacturer's instructions is generally sufficient.

Yeast infections are not usually caused by “dirty underwear.”

Do Hot Baths or Hot Tubs Cause Yeast Infections?

There is not enough evidence to say that everyone needs to avoid hot baths or hot tubs specifically to prevent vaginal candidiasis.

However, heat, prolonged moisture and certain chemicals can irritate sensitive vulvar skin in some people.

If a particular activity consistently causes irritation or seems associated with symptoms, reducing exposure may be sensible.

Menstrual Hygiene

Change menstrual products according to:

• product instructions,
• your menstrual flow,
• and appropriate hygiene practices.

Avoid fragranced menstrual products if they irritate the vulvar area.

Menstruation itself does not mean that the vagina needs internal cleaning.

When Should You See a Healthcare Professional?

Seek medical advice if:

• this is your first suspected yeast infection,
• you are unsure whether the symptoms are candidiasis,
• symptoms are severe,
• treatment does not work,
• symptoms quickly return,
• infections occur repeatedly,
• you are pregnant,
• you have poorly controlled diabetes,
• you have a weakened immune system,
• or you have symptoms suggesting another infection.

Symptoms That May Suggest Something Else

Professional assessment is particularly important if you have:

• strong or fishy vaginal odour,
• green, yellow or grey discharge,
• sores, ulcers or blisters,
• unexplained vaginal bleeding,
• pelvic or lower abdominal pain,
• fever,
• significant pain during sex,
• or possible exposure to a sexually transmitted infection.

These features are not typical of an uncomplicated vaginal yeast infection and may require different testing or treatment.

Can Children Get Vulvovaginal Candidiasis?

The original article says vaginal yeast infections can affect both children and adults.

Candida-related vulvovaginitis can occur in children, but persistent vulvar itching or vaginal discharge in a child should not automatically be assumed to be candidiasis.

Children can have vulvovaginal symptoms for many different reasons.

A child with persistent:

• itching,
• discharge,
• bleeding,
• pain,
• urinary symptoms,
• or significant genital irritation

should be evaluated by an appropriate healthcare professional.

The Bottom Line

Vaginal yeast infection, or vulvovaginal candidiasis, occurs when Candida yeast overgrows and causes inflammation of the vagina and vulva.

Typical symptoms include:

• intense itching,
• burning,
• soreness,
• vulvar redness or swelling,
• discomfort during sex or urination,
• and sometimes thick white discharge.

Important risk factors include:

• antibiotic use,
• pregnancy,
• poorly controlled diabetes,
• and weakened immune function.

Vaginal candidiasis is not generally classified as a sexually transmitted infection, and it does not mean that someone has poor hygiene.

Treatment usually involves antifungal medication.

Because bacterial vaginosis, trichomoniasis, STIs and other conditions can produce similar symptoms, professional diagnosis is particularly important for a first episode, unusual symptoms, pregnancy, recurrent infection or failed treatment.

Avoid douching and unproven substances inserted into the vagina, and seek medical advice when symptoms are persistent, recurrent or uncertain.

Medical Disclaimer

This article provides general health information for an international audience and is not a substitute for diagnosis or treatment by a qualified healthcare professional. Vaginal itching, burning and discharge have many possible causes, and treatments vary according to the diagnosis, pregnancy status, medical history and local recommendations. Seek appropriate medical care for persistent, recurrent or severe symptoms, pregnancy, fever, pelvic pain, unusual bleeding, genital sores or possible exposure to a sexually transmitted infection.

Sources and Further Reading

World Health Organization — Candidiasis (Yeast Infection)

https://www.who.int/news-room/fact-sheets/detail/candidiasis-(yeast-infection)

World Health Organization — Recommendations for Treatment of Candida albicans and Other Common Genital Infections

https://www.who.int/publications/i/item/9789240096370

Centers for Disease Control and Prevention — Vulvovaginal Candidiasis

https://www.cdc.gov/std/treatment-guidelines/candidiasis.htm

American College of Obstetricians and Gynecologists — Vaginitis

https://www.acog.org/womens-health/faqs/vaginitis

American College of Obstetricians and Gynecologists — Vulvovaginal Health

https://www.acog.org/womens-health/faqs/vulvovaginal-health