Labial itching is most often caused by either an infection or something irritating the skin. About 75% of women will get at least one yeast infection in their lifetime, making it the single most common reason for vulvar itching. But yeast is far from the only explanation. Contact irritation from everyday products, bacterial imbalances, hormonal changes, sexually transmitted infections, and chronic skin conditions can all cause the same frustrating symptom.
Yeast Infections
A yeast infection is the classic culprit. The itch tends to be intense and constant, often accompanied by thick, white, odorless discharge that looks like cottage cheese. You may notice a white coating in and around the vagina. Symptoms frequently worsen right before your period or after sex, and they’re more likely to show up after a course of antibiotics, which can knock out the protective bacteria that normally keep yeast in check. Around 40 to 45% of women who get one yeast infection will go on to have two or more.
Bacterial Vaginosis
Bacterial vaginosis (BV) happens when the normal balance of vaginal bacteria shifts. It doesn’t always cause itching, and many people with BV have no symptoms at all. When it does cause irritation, the giveaway is the discharge: thin, grayish or yellow-green, sometimes foamy, and often with a distinct fishy smell. That odor is the clearest way to tell BV apart from a yeast infection, which typically has no smell. BV is the most common vaginal infection overall, so it’s worth considering even if the itch is your only complaint.
Contact Irritation From Everyday Products
Noninfectious irritation accounts for up to one third of all vulvovaginitis cases. The skin of the labia is thinner and more absorbent than the skin on your arm or leg, which makes it especially reactive to chemicals. Common triggers include soap, bubble bath, shampoo that rinses down during a shower, scented laundry detergent, dryer sheets, perfume, deodorant sprays, douches, and talcum powder. Menstrual pads, panty liners, and tampons can also cause reactions, as can spermicides, latex condoms, lubricants, and underwear made from synthetic materials like nylon.
Even products marketed as “gentle” or “feminine care” can be problematic. Tea tree oil, dyes, food preservatives, and nickel (found in some underwear clasps or piercings) are all documented irritants. The itching from contact dermatitis usually stays on the outer skin rather than inside the vaginal canal, and it may come with redness, swelling, or a raw feeling. The simplest diagnostic test is elimination: stop using the suspected product and see if the itch resolves within a few days.
Hormonal Changes and Vaginal Atrophy
Declining estrogen levels thin and dry out the vaginal and labial tissue, making it more fragile and prone to irritation. This is most common during and after menopause, but it also happens while breastfeeding, after surgical removal of the ovaries, or during certain cancer treatments. Without adequate estrogen, the vaginal lining loses its normal moisture and elasticity, and the acid balance shifts. The result is dryness, burning, and persistent itching of both the vagina and the outer vulva. Many people first notice decreased lubrication during sex before the itching becomes a standalone problem.
Sexually Transmitted Infections
Trichomoniasis is a common STI that causes itching, burning, and soreness of the vulva. When discharge is present, it’s typically gray-green and may smell unpleasant. Many people with trichomoniasis have no symptoms at all, which means it can go undetected for a long time. Genital herpes can also cause vulvar itching or tingling, sometimes before visible blisters appear. If the itching came on after a new sexual partner or is accompanied by sores, blisters, or burning during urination, an STI screen is a reasonable next step.
Chronic Skin Conditions
When labial itching persists for weeks or months without an obvious infection or irritant, a skin condition may be responsible. Lichen sclerosus causes patches of thin, discolored, wrinkled skin on the vulva and anal area. The itching can be severe, and the skin becomes fragile enough to bruise or tear easily. Some people also develop painful sex, blistering, or changes around the urethra. Lichen planus and psoriasis can also affect the vulva, and chronic scratching itself can lead to a thickened, leathery skin texture called lichen simplex chronicus, which perpetuates the itch-scratch cycle. These conditions are diagnosed through a skin biopsy and require specific treatment that differs from what you’d use for an infection.
Less Common Causes
A forgotten tampon or other foreign body in the vagina can trigger inflammation, discharge, and itching. Urinary incontinence can cause chemical irritation if urine sits against the skin for extended periods. Allergic reactions to specific medications, vaginal contraceptive rings, or diaphragms occasionally present as labial itching as well.
How to Protect Labial Skin
The American College of Obstetricians and Gynecologists recommends washing the inner vulva with plain water only. Soap, even mild soap, can strip the natural oils and disrupt the skin barrier. Sprays, deodorants, and douches are not recommended and can make symptoms worse. For clothing, choose underwear with a cotton crotch panel and avoid tight-fitting pants or synthetic fabrics that trap heat and moisture. Leggings and tights should also have a cotton-lined crotch. If you use pads or panty liners daily, switching to unscented versions or taking breaks from them can reduce chronic low-grade irritation.
If mild itching starts and you haven’t changed any products recently, these hygiene adjustments alone often resolve it within a few days. Itching that comes with unusual discharge, a strong odor, blisters or open sores, fever, pelvic pain, or burning during urination points toward something that needs a clinical evaluation rather than home care.