Vaginal burning is one of the most common gynecological complaints, and it almost always points to something treatable. The cause ranges from a simple reaction to a new soap to an infection that needs medication. What matters most is the pattern: whether the burning is internal or external, whether it comes with discharge, and how long it’s been going on.
Infections That Cause Burning
Three types of vaginal infections account for the majority of burning complaints, and each one feels and looks a little different.
Yeast infections cause burning along with intense itching. The hallmark is thick, white, odorless discharge, sometimes with a white coating in and around the vagina. Yeast infections happen when the naturally occurring candida in your vagina overgrows, often triggered by antibiotics, hormonal changes, or a weakened immune system. Over-the-counter antifungal treatments come in one-day, three-day, and seven-day options. You should start feeling better within the first three days. If symptoms haven’t improved after seven days of treatment, the infection may be something else entirely.
Bacterial vaginosis (BV) is the most common vaginal infection in women ages 15 to 44. The burning tends to be milder than with yeast, but the distinguishing feature is the discharge: grayish, foamy, and fishy-smelling. BV happens when the balance of bacteria in the vagina shifts. It requires a prescription antibiotic, so over-the-counter yeast treatments won’t help.
Trichomoniasis is a sexually transmitted infection that can cause anything from mild irritation to severe inflammation. Symptoms typically appear 5 to 28 days after exposure, though some people don’t develop them until much later. Trich also increases the risk of getting or spreading other STIs, including HIV, because it causes genital inflammation. It’s treated with a prescription antibiotic.
STIs Beyond Trichomoniasis
Genital herpes can produce a stinging or burning sensation, especially during urination, before or during an outbreak. The first time you’re infected, sores typically appear 2 to 10 days after exposure as small, fluid-filled blisters grouped in clusters. The surrounding area may be swollen and tender. A first outbreak can last two to four weeks, while later outbreaks tend to heal within three to seven days. Some people notice a burning or tingling feeling in the skin before blisters even appear.
Chlamydia and gonorrhea can also cause internal burning, though many people with these infections have no symptoms at all. Both are bacterial and treatable with antibiotics, but left untreated they can spread deeper into the reproductive tract.
Contact Irritation and Allergic Reactions
External burning, especially around the vulva, is frequently caused by a product rather than an infection. The list of potential irritants is long: soap, bubble bath, shampoo, deodorant, perfume, douches, talcum powder, laundry detergent, dryer sheets, pads, panty liners, tampons, spermicides, toilet paper, tea tree oil, dyes, and even underwear made from synthetic materials like nylon.
This type of burning usually shows up shortly after contact with the irritant and improves once you stop using it. If you recently switched products or started using something new, that’s the first thing to eliminate. Washing the vulva with warm water only (no soap) for a few days can help you figure out whether a product is the problem. The vagina is self-cleaning and doesn’t need internal washing with any product. Douching, in particular, disrupts the natural bacterial balance and can make burning worse or set the stage for BV.
Hormonal Changes and Vaginal Dryness
When estrogen levels drop, the vaginal lining loses thickness, moisture, and elasticity. Healthy vaginal tissue is several layers thick and naturally lubricated. Without enough estrogen, it becomes thin, dry, and fragile, which can cause persistent burning, itching, and discomfort during sex.
This is most common after menopause, but it also happens during breastfeeding, after surgical removal of the ovaries, and sometimes with certain medications. The condition tends to get progressively worse without treatment because the tissue continues to thin over time. Topical estrogen applied directly to the vaginal area is a common treatment that restores moisture and tissue thickness without the systemic effects of oral hormone therapy. Non-hormonal vaginal moisturizers can also help with day-to-day comfort.
Chronic Burning Without a Clear Cause
If vaginal or vulvar burning persists for months and no infection, irritant, or hormonal issue explains it, the condition may be vulvodynia. This is chronic pain of the vulva that doesn’t have an identifiable cause. The burning can be constant or triggered by touch, sitting, or wearing tight clothing.
Diagnosis involves ruling everything else out. A provider will typically do a pelvic exam, test for infections, check pelvic floor muscle tenderness, and sometimes use a cotton swab to map specific painful areas on the vulva. Blood tests may check hormone levels, and in rare cases a small tissue sample is taken if the skin looks unusual. Treatment varies from person to person and often involves a combination of topical medications, pelvic floor physical therapy, and sometimes nerve-targeting oral medications.
How to Tell What’s Causing Yours
A few details can help you narrow things down before you see a provider:
- Thick white discharge with itching: likely a yeast infection
- Gray, fishy-smelling discharge: likely BV
- Burning with blisters or sores: possible herpes outbreak
- Burning that started after a new product: likely contact irritation
- Burning with dryness, especially after menopause: likely low estrogen
- Burning during urination only: could be a urinary tract infection, herpes, or external irritation
A healthy vaginal pH falls between 3.8 and 4.5. BV and trichomoniasis push that number higher, while yeast infections typically don’t change pH much. At-home pH test strips can provide a clue, though they can’t diagnose a specific condition on their own.
Signs That Need Prompt Attention
Most vaginal burning resolves with straightforward treatment, but certain symptoms alongside burning suggest something more serious. Fever, chills, or pelvic pain could indicate that an infection has spread beyond the vagina into the uterus or fallopian tubes. New sores or blisters warrant testing for herpes or other STIs. And if you’ve tried an over-the-counter yeast treatment without improvement after a week, the cause is likely something that requires a different medication. Recurrent burning that keeps coming back after treatment also deserves a closer look, since repeated episodes sometimes signal an underlying condition that hasn’t been addressed.