Vaginal or vulvar burning usually comes down to one of a few common causes: an infection, a reaction to something irritating the skin, hormonal changes, or friction. About half the time, the culprit is either bacterial vaginosis or a yeast infection, which together account for roughly 45% of all vaginitis cases. The good news is that most causes are treatable once you figure out what’s going on.
Yeast Infections: The Most Recognizable Cause
Yeast infections cause burning, itching, and pain, especially after sex. The telltale sign is a thick, cottage cheese-like discharge that typically doesn’t have a strong odor. The burning tends to feel worst on the vulva (the outer skin) rather than deep inside, and it can flare up after urinating or during intercourse.
Yeast infections happen when a fungus that normally lives in the vagina in small amounts grows out of control. Antibiotics, hormonal birth control, pregnancy, and even a diet high in sugar can trigger this overgrowth. Over-the-counter antifungal treatments work for most straightforward cases, but if you’ve never had one before or your symptoms don’t clear up after treatment, it’s worth getting tested to make sure it’s actually yeast and not something else.
Bacterial Vaginosis: More Subtle but Very Common
Bacterial vaginosis (BV) is roughly as common as yeast infections. It causes a thin, grayish discharge that can be heavy in volume and often has a noticeable fishy smell, especially after your period or after sex. BV can cause irritation, but it typically doesn’t cause the same level of pain that a yeast infection does.
The key difference: BV shifts the vagina’s natural pH. A healthy vaginal pH sits between 3.8 and 4.5, and BV pushes it higher, creating an environment where certain bacteria thrive. BV requires prescription antibiotics, so over-the-counter yeast treatments won’t help. If your burning comes with that characteristic thin discharge and smell, BV is a strong possibility.
STIs That Cause Burning
Trichomoniasis is a sexually transmitted infection that causes itching, burning, soreness of the vagina and vulva, and painful urination. It’s caused by a parasite and is diagnosed through a lab test. Trichomoniasis can also increase the risk of getting or spreading other STIs, which is one reason testing matters.
Chlamydia and gonorrhea can also cause vaginal burning, though many people with these infections have no symptoms at all, which makes them easy to miss. If you’ve had a new sexual partner or multiple partners recently, STI testing is especially important. These infections are all curable with the right treatment, but they won’t go away on their own.
Products Irritating Your Skin
Sometimes the burning has nothing to do with an infection. Vulvar dermatitis, essentially a skin reaction, is triggered by everyday products that come into contact with sensitive vulvar tissue. Common culprits include soap, bubble bath, scented laundry detergent, pads and panty liners, toilet paper with dyes or fragrance, synthetic underwear (especially nylon), douches, spermicides, and even tea tree oil.
This type of burning often starts after switching to a new product or using something more frequently. It can feel like a raw, stinging sensation on the outer skin. The fix is usually straightforward: identify the product causing the reaction and stop using it. Switch to fragrance-free versions of anything that touches that area, including detergent and toilet paper. Cotton underwear helps, too.
Low Estrogen and Vaginal Dryness
If you’re in perimenopause, menopause, or postmenopause, burning and dryness often trace back to dropping estrogen levels. Estrogen keeps the vaginal lining thick, moist, and well-supplied with blood flow. Without enough of it, the tissue becomes thinner, drier, and less stretchy. The vaginal canal can actually narrow and shorten over time. This condition, called vaginal atrophy, leads to itching, burning, and pain during sex.
Lower estrogen also reduces natural vaginal lubrication and changes the acid balance, making the tissue more fragile and easier to irritate. This isn’t limited to older women. Breastfeeding, certain medications, and some cancer treatments can also lower estrogen enough to cause these symptoms. Vaginal moisturizers and prescription estrogen treatments applied locally can make a significant difference.
Quick Relief While You Figure It Out
While you’re working out the cause, a few things can ease the discomfort. Wear loose-fitting clothes and cotton underwear to reduce friction and let air circulate. A cold pack wrapped in a cloth can calm intense itching or burning. Sitting in a salt bath for 5 to 10 minutes daily can soothe irritated tissue. You can also make a simple salt water spray by adding one teaspoon of salt to 600 milliliters of water and spraying it on the vulva while sitting on the toilet.
When you urinate, leaning forward can help direct the stream away from irritated skin, which reduces stinging. Wash your clothes with unscented soap and rinse thoroughly. Avoid applying any medicated creams you already have at home unless you know what’s causing the problem, since the wrong treatment can make things worse or mask symptoms that would help with diagnosis.
Signs You Need Testing
A few specific situations call for a proper evaluation rather than guessing: if you’ve never had a vaginal infection before, if you’ve tried over-the-counter yeast treatment and the burning persists, if you have a new or recent sexual partner, or if the discharge smells particularly strong or unusual. Fever, chills, or pelvic pain alongside burning are more urgent signals that something beyond a routine infection may be happening. Co-infections, where two problems occur at the same time (like BV and a yeast infection together), happen in about 6% of vaginitis cases, which is another reason that self-treatment doesn’t always work on the first try.