Vaginal burning is most commonly caused by an infection, a chemical irritant, or hormonal changes, and narrowing down the cause usually comes down to what other symptoms you’re experiencing alongside it. The burning can affect the inside of the vaginal canal, the outer vulvar skin, or both, and each pattern points toward different causes.
Yeast Infections
A yeast infection is one of the most common reasons for vaginal burning. The hallmark combination is burning plus itching, often accompanied by a thick, white discharge that looks like cottage cheese. The discharge typically doesn’t have a strong odor. You might also notice swelling or redness around the vulva, and sex or urination can feel painful.
Uncomplicated yeast infections can be treated with over-the-counter antifungal creams or suppositories, which are used for anywhere from one to seven days depending on the product. A single oral antifungal pill is also effective and available by prescription. If you’re getting four or more yeast infections a year, that’s considered recurrent, and your doctor may recommend a longer initial treatment followed by weekly oral medication for up to six months to keep infections from coming back.
Bacterial Vaginosis
BV is actually the most common cause of abnormal vaginal discharge, affecting 23% to 30% of people of reproductive age. Its signature symptom is a fishy-smelling discharge, which often gets stronger after sex. While burning and irritation can happen with BV, the smell is usually what stands out most. The discharge tends to be thin and grayish-white rather than thick.
BV happens when the normal balance of bacteria in the vagina shifts. A healthy vagina maintains an acidic pH between 3.8 and 4.5, which keeps protective bacteria thriving. When that pH rises, harmful bacteria can take over. BV requires prescription antibiotics, so over-the-counter yeast treatments won’t help.
Contact Irritants and Allergic Reactions
Sometimes the burning has nothing to do with an infection. The vulvar and vaginal tissue is far more sensitive than the skin on the rest of your body, and many everyday products can trigger irritation or an allergic reaction. Common culprits include soap, bubble bath, shampoo, laundry detergent, scented pads or panty liners, douches, perfume, spermicides, synthetic underwear fabrics like nylon, dryer sheets, toilet paper, and even tea tree oil.
Contact irritation typically causes burning, redness, and sometimes swelling on the outer vulva rather than deep inside the vaginal canal. It usually doesn’t produce an unusual discharge or smell. If the burning started shortly after you switched to a new product, that’s a strong clue. Stopping the offending product is often all it takes for symptoms to resolve within a few days.
Sexually Transmitted Infections
Several STIs can cause vaginal or vulvar burning, though many don’t produce obvious symptoms at first.
- Chlamydia can cause painful urination that feels like burning, along with abnormal discharge. Many people have no symptoms at all, which is why routine screening matters.
- Gonorrhea produces similar symptoms: burning during urination and sometimes increased discharge.
- Trichomoniasis is a parasitic infection that causes itching, a frothy or foul-smelling discharge, and burning. It’s sometimes mistaken for BV because of the odor.
- Genital herpes causes pain and itching around the genitals, buttocks, and inner thighs. You may notice small blisters or open sores, and urination can become painful when urine touches those sores.
If you’ve had a new sexual partner, multiple partners, or unprotected sex, an STI screening is worth pursuing even if burning is your only symptom. All of these infections are treatable, but they require different medications, so getting the right diagnosis matters.
Low Estrogen and Menopause
If you’re in perimenopause, menopause, or postmenopause, declining estrogen levels are a likely explanation for vaginal burning. Estrogen plays a direct role in keeping vaginal tissue thick, elastic, and well-lubricated. It maintains blood flow to the area, supports collagen production, and helps the vagina produce the secretions that keep it moist.
When estrogen drops, the vaginal lining thins and loses elasticity. The tissue becomes fragile and prone to tiny tears. Lubrication decreases, both at rest and during arousal. The vaginal pH rises above 5, which disrupts the protective bacterial environment and makes infections more likely. Over time, the vaginal opening can narrow, and the labia may become thinner. The result is persistent dryness, burning, and pain during sex.
This isn’t limited to menopause. Breastfeeding, certain medications, and some cancer treatments can also lower estrogen enough to cause these changes. Vaginal moisturizers can help with mild symptoms, while prescription estrogen applied directly to the vaginal tissue is effective for more significant discomfort.
Vulvodynia
If you’ve been evaluated for infections, irritants, and hormonal changes and nothing explains the burning, vulvodynia may be the cause. This is chronic vulvar pain lasting three months or longer with no identifiable cause. It can feel like burning, stinging, rawness, or soreness, and it may be constant or triggered only by touch or pressure (like sitting, wearing tight clothing, or having sex).
Diagnosis involves ruling out other conditions first. Your doctor will typically do a pelvic exam, test for infections, and perform a cotton swab test, where a moistened cotton swab is gently pressed against different areas of the vulva to map where the pain is and how intense it feels. Blood tests to check hormone levels and, in some cases, a small tissue biopsy may also be part of the workup. Treatment varies and can include topical medications, pelvic floor physical therapy, or nerve-targeted approaches.
Skin Conditions on the Vulva
The vulvar skin can develop the same dermatological conditions that affect skin elsewhere on the body, and some conditions have a particular affinity for the genital area. Lichen sclerosus causes patchy, thin, discolored skin that may look white or wrinkled. It brings itching, soreness, burning, and makes the skin so fragile that it bruises and tears easily. Blistering, open sores, and painful sex are also common. This condition requires a doctor’s evaluation and prescription treatment to manage symptoms and prevent scarring.
How to Tell What’s Causing Your Symptoms
A few patterns can help you narrow things down before you see a provider. Burning with thick, odorless white discharge points toward a yeast infection. Burning with thin, fishy-smelling discharge suggests BV. Burning that started after trying a new soap, detergent, or pad is likely contact irritation. Burning with sores or blisters warrants an STI evaluation. Persistent dryness and burning in someone over 40 or going through hormonal changes points toward low estrogen. Burning that’s lasted months with no clear trigger could be vulvodynia.
Seek care promptly if your burning is accompanied by fever, chills, or pelvic pain, if you notice unusual sores, if you’ve tried over-the-counter yeast treatment without improvement, or if this is your first vaginal infection and you’re unsure what you’re dealing with. Even if you’ve had infections before, getting the wrong diagnosis and using the wrong treatment can make symptoms worse or mask something that needs different care.