Vaginal burning is most often caused by an infection, an irritant, or a hormonal change. The five most common causes are bacterial vaginosis, yeast infections, trichomoniasis (an STI), contact irritation from products, and the vaginal thinning that happens around menopause. Your discharge, odor, and any other symptoms can help narrow down which one is behind the burning.
Yeast Infections
Yeast infections are the second most common type of vaginal inflammation overall, and they’re probably the first thing most people think of when they feel burning. A fungus called candida normally lives in your vagina in small amounts, but when it overgrows, it causes burning, itching, and a thick, white, cottage cheese-like discharge. The discharge usually doesn’t smell much.
One useful detail: yeast infections don’t change your vaginal pH. A healthy vagina sits at a pH of about 4.0 to 4.5, and a yeast infection keeps it in that range. This is one reason yeast infections feel different from bacterial causes, and it’s also why over-the-counter pH test strips can sometimes help you tell the difference. Mild, uncomplicated yeast infections often respond to a single dose of an oral antifungal or to topical antifungal creams available at most pharmacies.
Bacterial Vaginosis
Bacterial vaginosis (BV) is actually the most common type of vaginitis. It happens when the normal bacteria in your vagina overgrow and shift the balance away from the protective, acid-producing bacteria that keep things in check. That bacterial shift raises your vaginal pH above 4.5.
The hallmark of BV is a thin, grayish discharge that can be heavy in volume and has a noticeable fishy odor, especially after your period or after sex. Burning and irritation are common, but the smell and the character of the discharge are what set BV apart from a yeast infection. BV requires a prescription antibiotic to treat, typically taken for five to seven days.
STIs That Cause Burning
Several sexually transmitted infections cause vaginal burning, and some of them can be easy to miss because symptoms don’t always appear right away.
Trichomoniasis is caused by a tiny parasite spread through sexual contact. It causes vaginal burning, itching, soreness, painful urination, and often a smelly discharge. Symptoms can show up anywhere from 5 to 28 days after exposure, but many people with trichomoniasis have no symptoms at all. When it does cause symptoms, the vaginal pH typically climbs above 5.4, which is noticeably higher than normal.
Chlamydia and gonorrhea both cause a burning sensation, though the burning tends to be most noticeable during urination. Chlamydia symptoms usually start 5 to 14 days after exposure, while gonorrhea symptoms in women tend to appear within 10 days. Both infections are frequently silent, meaning you can have them without obvious symptoms for weeks or longer.
Genital herpes can cause painful sores or ulcers on or near the vulva, and urination can burn when it passes over those open sores. Symptoms, when they appear, tend to show up within about 12 days of exposure.
If you have a new sexual partner, multiple partners, or any reason to suspect an STI, testing is the only reliable way to know. Many of these infections overlap in how they feel, and several can exist at the same time.
Contact Irritation From Everyday Products
Sometimes the burning has nothing to do with an infection. The vulvar skin is thinner and more sensitive than most other skin on your body, and it reacts to a surprisingly long list of everyday products. This type of irritation is called contact dermatitis, and it can mimic an infection closely enough to cause confusion.
Common irritants include:
- Hygiene products: scented soaps, body washes, douches, feminine wipes, deodorant sprays, powders, and perfumes
- Menstrual products: sanitary pads, panty liners, and some tampons
- Sexual products: lubricants, spermicides, arousal gels, condoms (especially latex), and diaphragms
- Laundry products: detergent, bleach, and fabric softener
Sodium lauryl sulfate, a foaming agent found in many soaps and shampoos, is one of the most well-documented vulvar irritants. If you recently switched soap, detergent, or started using a new lubricant, that’s a strong clue. The fix is straightforward: stop using the product. Burning from contact irritation usually improves within a few days once the irritant is removed. Washing with plain warm water and wearing cotton underwear can help the area recover.
Hormonal Changes and Menopause
If you’re in perimenopause or postmenopause and experiencing vaginal burning, declining estrogen is a likely cause. Estrogen is what keeps vaginal tissue thick, elastic, and lubricated. As estrogen drops, the tissue thins and dries out, a condition now called genitourinary syndrome of menopause. The result is a chronic burning sensation, itching, dryness, and pain during sex.
This isn’t limited to people going through natural menopause. Anyone who has had their ovaries surgically removed, or who is on certain medications that suppress estrogen, can develop the same symptoms. Unlike infections, this type of burning doesn’t come with unusual discharge or odor. It tends to build gradually over months rather than appearing suddenly. Topical estrogen treatments prescribed by a healthcare provider are the most effective approach, and they work by restoring moisture and thickness to the vaginal walls.
Chronic Burning Without a Clear Cause
If you’ve been tested for infections, removed potential irritants, and the burning still hasn’t gone away after three months or more, the issue may be vulvodynia. This is a chronic pain condition involving persistent vulvar burning, stinging, or rawness that has no identifiable underlying cause. The pain can be localized to one spot or spread across the entire vulvar area, and it may be constant or triggered only by touch or pressure, like during sex, tampon insertion, or even sitting for long periods.
Vulvodynia is a diagnosis of exclusion, meaning doctors arrive at it by ruling out everything else first. There’s no blood test or swab that confirms it. During evaluation, a clinician will typically use a cotton swab to gently press on different areas of the vulva, asking you to rate the pain at each spot. This mapping helps identify exactly where the sensitivity is and how severe it is. Treatment usually involves a combination of approaches, including pelvic floor physical therapy, topical medications, and sometimes nerve-targeting treatments, tailored to how the pain presents in your specific case.
How to Tell What’s Causing Your Burning
Your other symptoms are the best initial guide. Thick, white, clumpy discharge with no strong odor points toward a yeast infection. Thin, grayish discharge with a fishy smell suggests BV. Burning mainly during urination, especially with a new sexual partner, raises the possibility of chlamydia, gonorrhea, or trichomoniasis. Burning with no discharge changes, particularly if it started after using a new product, is most consistent with contact irritation. And a gradual onset of burning alongside vaginal dryness in your 40s or 50s suggests hormonal thinning.
That said, self-diagnosis is unreliable for vaginal symptoms. Studies consistently show that people who think they have a yeast infection are wrong about half the time. If the burning is your first episode, if it came with fever or pelvic pain, if your discharge looks green or yellow, or if over-the-counter treatment hasn’t helped within a few days, getting tested gives you a clear answer and the right treatment instead of a guess.