Vaginal or vulvar burning is almost always a sign of irritation, infection, or a change in your body’s natural chemistry. The most common culprits are yeast infections, bacterial vaginosis, chemical irritants, and sexually transmitted infections. Most causes are treatable and not dangerous, but figuring out which one is behind your symptoms matters because the treatments are very different.
Yeast Infections
A vaginal yeast infection is one of the most frequent reasons for burning down there. About three out of four women will get at least one in their lifetime. The burning can show up inside the vagina, around the vulva, or both, and it often gets worse when you pee or during sex.
The telltale signs that point to yeast rather than something else: thick, white discharge that looks like cottage cheese, redness and swelling around the vulva, and intense itching alongside the burning. You might also notice small cuts or tiny cracks in the skin of your vulva. Yeast infections happen when a fungus called Candida, which normally lives in the vagina in small amounts, overgrows. Antibiotics, hormonal changes, a weakened immune system, and high blood sugar can all trigger this overgrowth.
Over-the-counter antifungal treatments work well for straightforward yeast infections. But if you’ve never had one before, it’s worth getting a proper diagnosis first, because other conditions can look similar.
Bacterial Vaginosis
Bacterial vaginosis (BV) happens when the balance of bacteria in the vagina shifts, with harmful bacteria outnumbering the protective ones. It’s the most common vaginal infection in women aged 15 to 44, and many people with BV don’t have symptoms at all.
When symptoms do appear, you may notice burning or pain in the vagina, a thin white or gray discharge, burning when you pee, and itching around the outside of the vagina. The distinguishing feature of BV is a strong fishy odor, especially after sex. If your burning comes with that smell, BV is a likely candidate. Unlike yeast infections, BV requires a prescription to treat and won’t respond to antifungal creams.
Chemical Irritants and Allergic Reactions
Sometimes the burning has nothing to do with infection. The vulva is covered in thin, sensitive skin, and it reacts to chemical irritants more easily than most other parts of your body. This reaction, called vulvar dermatitis, can cause burning, stinging, redness, and swelling that feels a lot like an infection.
Common triggers include soap, bubble bath, shampoo and conditioner (which runs down your body in the shower), deodorant, perfume, douches, talcum powder, laundry detergent, dryer sheets, spermicides, and dyes in colored toilet paper or underwear. Even nickel, found in some body jewelry, can cause a reaction. The fix here is simple but requires some detective work: stop using scented products near the vulva, switch to a fragrance-free detergent, and wash with warm water only. If the burning clears up within a few days, you’ve found your answer.
Sexually Transmitted Infections
Several STIs cause vaginal or vulvar burning. Trichomoniasis, caused by a parasite, produces itching, burning, redness, and soreness of the genitals along with discomfort when peeing. You may also notice a clear, white, yellowish, or greenish discharge with a fishy smell. Chlamydia and gonorrhea can both cause burning during urination and unusual discharge, though many people with these infections have no symptoms at all.
Genital herpes causes burning in a different pattern. It typically comes with visible sores or blisters on the vulva, and the burning is localized to those spots. The first outbreak is usually the most painful and can include flu-like symptoms.
None of these can be diagnosed based on symptoms alone. Testing is the only reliable way to confirm or rule out an STI.
Hormonal Changes and Low Estrogen
Estrogen keeps the vaginal lining thick, elastic, and lubricated. When estrogen drops, whether from menopause, breastfeeding, certain medications, or surgical removal of the ovaries, the vaginal tissue thins and dries out. This condition, called vaginal atrophy, is extremely common. In one large study of postmenopausal women with this condition, 100% reported vaginal dryness, about 57% experienced burning, and a similar percentage had itching.
The burning from low estrogen tends to be constant or near-constant rather than coming and going. It often gets worse during sex because the thinner tissue is more easily irritated by friction. If you’re in your 40s or older and the burning crept in gradually alongside dryness, hormonal changes are a strong possibility. Vaginal moisturizers help with mild cases, and prescription estrogen applied locally is effective for more significant symptoms.
Vulvodynia
If you’ve been tested for infections and irritants and everything comes back normal, but the burning persists, vulvodynia may be the explanation. This is chronic vulvar pain with no identifiable cause. The burning can be generalized across the whole vulva or localized to one spot, often the vaginal opening. It can be constant or triggered only by touch or pressure, like sitting for long periods or inserting a tampon.
Vulvodynia is a diagnosis of exclusion, meaning your provider rules out everything else first. It’s not dangerous, but it can significantly affect quality of life. Treatment typically involves a combination of approaches: topical pain-relieving creams, pelvic floor physical therapy, and sometimes medications that calm overactive nerve signals.
How to Tell What’s Causing Your Symptoms
The burning itself doesn’t tell you much on its own. The clues are in the other symptoms that come with it:
- Thick white cottage cheese discharge + itching: likely a yeast infection
- Thin gray discharge + fishy odor: likely bacterial vaginosis
- Burning that started after using a new product: likely an irritant reaction
- Colored or unusual discharge + new sexual partner: worth testing for STIs
- Gradual dryness + burning in your 40s or later: likely hormonal
- Persistent burning with no discharge or odor and normal test results: possibly vulvodynia
A healthy vagina has a pH between 3.8 and 4.5, which is moderately acidic. Infections, semen, menstrual blood, and harsh soaps can all push that pH higher, creating an environment where protective bacteria struggle and harmful organisms thrive. This is one reason douching consistently makes things worse: it disrupts the acid balance your vagina maintains on its own.
If the burning is your first episode, comes with fever or pelvic pain, follows unprotected sex, or hasn’t responded to over-the-counter treatment, getting examined and tested gives you a clear answer and the right treatment rather than guessing.