Vaginal burning is common and usually caused by something treatable, like an overgrowth of yeast, a shift in vaginal bacteria, or irritation from a product your skin doesn’t agree with. It can show up as a constant stinging sensation, a burn that flares during urination, or pain that only appears during or after sex. The cause matters because each one calls for a different fix.
Yeast Infections
A yeast infection is one of the most frequent reasons for vaginal burning, especially when the burning comes with intense itching on the outer skin (the vulva). The fungus Candida naturally lives in the vagina in small amounts, but when something throws off the balance, it multiplies and causes symptoms. You might notice a thick, white discharge that looks like cottage cheese, redness, swelling, and soreness. The discharge typically has no strong smell.
Burning from a yeast infection often feels external rather than deep inside. If it stings when you urinate, it’s usually because urine is hitting irritated skin on the outside, not because something is wrong with your urinary tract. That distinction helps separate a yeast infection from a bladder infection, where the burning sensation feels like it’s coming from inside the urethra itself. Severe yeast infections can cause tiny cracks or fissures in the vulvar skin, which makes the burning worse and takes longer to resolve with short courses of treatment.
Bacterial Vaginosis
Bacterial vaginosis (BV) is the most common vaginal infection in women ages 15 to 44. It develops when the normal balance between helpful and harmful bacteria in the vagina tips in the wrong direction. The hallmark symptom is a thin, white or gray discharge with a strong fishy odor, especially noticeable after sex. Some people with BV experience burning or irritation, but many have no symptoms at all.
BV is not the same as a yeast infection, and the treatments are completely different. If you’re treating what you assume is a yeast infection but the symptoms don’t improve, or if you notice a fishy smell, BV is a likely alternative. A healthcare provider can distinguish BV from other infections by checking vaginal pH (which rises above 4.5 with BV) and examining a sample under a microscope.
Contact Irritation From Everyday Products
Sometimes the burning has nothing to do with an infection. The vulva is covered in sensitive skin, and dozens of common household products can trigger irritation or an allergic reaction. Cleveland Clinic lists these among the most frequent culprits:
- Soaps, bubble baths, and body washes with fragrance or harsh surfactants
- Laundry detergent and dryer sheets that leave chemical residue on underwear
- Scented pads, panty liners, and tampons
- Douches, vaginal sprays, and deodorants
- Spermicides and certain lubricants
- Synthetic underwear made from nylon or other non-breathable fabrics
This type of burning, called vulvar contact dermatitis, tends to show up as redness, stinging, and sometimes swelling in the area that touched the irritant. The fix is straightforward: stop using the product. Switching to fragrance-free soap, unscented detergent, and cotton underwear resolves many cases within days. If you recently changed a product and the burning started shortly after, that connection is worth paying attention to.
Sexually Transmitted Infections
Several STIs can cause vaginal burning, and many of them produce few or no symptoms in the early stages, which makes testing important if you’re sexually active.
Trichomoniasis is a common STI caused by a parasite. When it does cause symptoms (which can take 5 to 28 days after exposure), they include vaginal itching, burning, soreness, and a greenish-yellow discharge that may smell fishy. Chlamydia and gonorrhea can both cause painful or burning urination, unusual discharge, bleeding between periods, and lower abdominal pain. Chlamydia symptoms, when present, typically appear 5 to 14 days after exposure. Gonorrhea tends to show symptoms within about 10 days in people with vaginas.
Genital herpes can also cause burning, particularly during urination if urine contacts open sores. The first outbreak is usually the most painful and may include small red bumps or blisters around the genitals, along with itching and a feeling of pressure in the lower abdomen. Because many STIs overlap in symptoms, testing is the only reliable way to tell them apart.
Urinary Tract Infections
A UTI causes burning that feels internal, centered in the urethra, and is most noticeable during urination. Other signs include a frequent, urgent need to pee, only passing small amounts, and pain above the pubic bone. If the burning is mainly on the outer skin and comes with itching or unusual discharge, the source is more likely vaginal than urinary. But the two can overlap, and sometimes a vaginal infection and a UTI occur at the same time, making it harder to sort out on your own.
Hormonal Changes
Estrogen plays a direct role in keeping vaginal tissue thick, elastic, and lubricated. When estrogen levels drop, whether from menopause, breastfeeding, or certain medications, the tissue thins out and produces less moisture. Blood flow to the area decreases, lubrication drops, and the vaginal walls lose their natural folds and stretchiness. The result is chronic dryness, irritation, and a burning sensation that can be constant or worsen during sex.
This condition, called genitourinary syndrome of menopause, is progressive. It doesn’t resolve on its own and tends to get worse over time without treatment. It affects the vulva, the vagina, and the urinary tract because all of these tissues rely on estrogen to function normally. If you’re in menopause or perimenopause and noticing persistent burning or dryness, this is one of the most likely explanations.
Vulvodynia: Burning With No Clear Cause
If vaginal or vulvar burning has lasted three months or longer and no infection, irritant, or hormonal issue has been found, the diagnosis may be vulvodynia. This is chronic pain in the vulva with no identifiable underlying condition. The pain can be constant or triggered by touch, such as sitting, wearing tight clothing, or inserting a tampon. It can feel like burning, stinging, rawness, or throbbing.
Vulvodynia is a real condition, not a sign that nothing is wrong. It’s diagnosed after other causes have been ruled out. Treatment approaches vary and are tailored to the individual, but options exist and many people see meaningful improvement over time.
How to Narrow Down the Cause
Paying attention to a few details can help you and a healthcare provider figure out what’s behind the burning:
- Location: External burning (on the vulvar skin) points toward yeast infections, contact irritation, or vulvodynia. Internal burning during urination suggests a UTI or STI.
- Discharge: Thick, white, odorless discharge suggests yeast. Thin, gray, fishy-smelling discharge suggests BV. Green or yellow discharge may indicate trichomoniasis or gonorrhea.
- Timing: Burning that started after switching a product is likely contact dermatitis. Burning that appeared days after sexual contact raises the possibility of an STI.
- Duration: Burning that comes and goes over weeks or months without responding to over-the-counter yeast treatments may be BV, an STI, a hormonal issue, or vulvodynia, all of which need a different approach.
Over-the-counter yeast treatments are reasonable to try once if your symptoms clearly match a yeast infection. But if the burning doesn’t resolve, comes back quickly, or is accompanied by unusual discharge, odor, or pelvic pain, getting tested gives you a definitive answer instead of guessing.