Itching on the outer lips of the vulva is most often caused by irritation from everyday products, not an infection. Up to one third of all vulvovaginal irritation cases are noninfectious, meaning something your skin touched triggered the itch. That said, infections like yeast and bacterial vaginosis are also common culprits, and a few other conditions are worth knowing about.
Contact Irritation Is the Most Common Cause
The skin on your vulva is thinner and more sensitive than skin on the rest of your body. Products that feel perfectly fine elsewhere can cause redness, burning, and intense itching when they come in contact with this area. The list of known irritants is long: soap, bubble bath, shampoo and conditioner that runs down during a shower, scented laundry detergent, dryer sheets, pads, panty liners, tampons, toilet paper, douches, feminine hygiene wipes, perfume, deodorant, talcum powder, tea tree oil, spermicides, and synthetic underwear fabrics like nylon. Even dyes in clothing and nickel from body jewelry can set it off.
This type of irritation, called vulvar contact dermatitis, usually looks like redness or slight swelling on the outer lips. It can feel like a burning itch that gets worse when you keep using the product. The fix is straightforward: stop using the product causing it. But because so many potential irritants exist, it sometimes takes a process of elimination to figure out which one is responsible.
Yeast Infections
A vaginal yeast infection is one of the first things most people suspect, and for good reason. It’s extremely common in reproductive-age women and produces a distinctive itch that can affect both the inner and outer lips of the vulva. The hallmark signs are thick, white, odorless discharge (often described as cottage cheese-like) and a white coating in and around the vagina. You might also notice redness, swelling, or soreness.
Yeast infections happen when a naturally occurring fungus in the vagina overgrows, often after antibiotic use, during pregnancy, or with changes in your immune system. A healthy vagina typically has a pH between 3.8 and 4.5. Yeast overgrowth can happen when that balance is disrupted. Over-the-counter antifungal treatments are widely available and effective for straightforward cases, but if the itching doesn’t resolve within a few days of treatment, something else may be going on.
Bacterial Vaginosis
Bacterial vaginosis (BV) is the other major infection that causes vulvar itching, though it can also cause no symptoms at all. When it does, the key difference from yeast is the discharge: BV typically produces a grayish, thin or foamy discharge with a fishy smell. Yeast discharge is thick and odorless. That distinction is the easiest way to tell them apart at home.
BV develops when the balance of bacteria in the vagina shifts, allowing certain types to dominate. It requires prescription treatment, not over-the-counter antifungals, which is one reason it’s important to pay attention to what your discharge looks and smells like before assuming yeast is to blame.
Sexually Transmitted Infections
Trichomoniasis is a parasitic STI that causes genital itching, burning, redness, and discomfort when peeing. Discharge can be clear, white, yellowish, or greenish with a fishy smell. About 70% of people with trichomoniasis have no symptoms at all, which means it can be passed between partners unknowingly. The parasite spreads through unprotected vaginal sex.
Other STIs like herpes and genital warts can also cause vulvar itching, though they’re more commonly associated with sores, bumps, or blisters. If itching started after a new sexual partner or unprotected sex, STI testing is worth considering even if no other symptoms are present.
Chronic Skin Conditions
When vulvar itching persists for weeks or months and doesn’t respond to infection treatments, a skin condition may be responsible. Psoriasis, lichen planus, and lichen sclerosus can all affect the vulva. Lichen sclerosus, for example, causes smooth, discolored patches of skin that may look white or blotchy, wrinkled, and fragile. The skin bruises easily, and you might notice soreness, burning, or pain during sex. It’s not contagious or sexually transmitted.
These conditions are less common than infections or irritant reactions but important to recognize because they require specific treatment. If your vulvar skin looks visibly different (discolored, thickened, cracked, or blistered), that’s a sign something beyond a simple irritation is happening.
Hormonal Changes
Dropping estrogen levels during perimenopause and menopause cause the vulvar and vaginal tissues to thin, dry out, and lose elasticity. This is called genitourinary syndrome of menopause, and itching is one of its most common symptoms. The itch tends to be persistent and may come with dryness, burning, or discomfort during sex. If you’re in your 40s or older and the itching feels more like dry, irritated skin than an infection, hormonal changes are a likely explanation.
Estrogen fluctuations during pregnancy, breastfeeding, and certain points in the menstrual cycle can also temporarily increase vulvar sensitivity and dryness, though these are usually milder.
How to Calm the Itch at Home
Start by removing potential irritants. Switch to fragrance-free laundry detergent, stop using scented soap or body wash on the vulva, and avoid feminine hygiene sprays, wipes, and douches entirely. Wash the vulva no more than once a day, using plain water or an unscented, gentle cleanser. More frequent washing can strip the skin’s natural moisture and make itching worse.
Wear loose-fitting, 100% cotton underwear during the day and skip underwear while sleeping to let the area breathe. Avoid tight jeans, leggings, and tights when possible. Applying an unscented moisturizing ointment or cream to the vulvar skin can soothe irritation and act as a protective barrier.
For temporary relief, over-the-counter hydrocortisone cream (1%) is designed for external vulvar itching. Apply it to the outer area up to three or four times a day. This is a short-term fix, not a long-term solution. If you need it for more than a week, the underlying cause likely needs attention.
Signs That Need Medical Attention
Some patterns of vulvar itching point to conditions you can’t resolve on your own. These include itching that lasts longer than a week despite removing irritants, discharge that’s unusual in color or smell, visible skin changes like white patches or open sores, bleeding or blistering, pain during sex that’s new or worsening, and itching that returns repeatedly after over-the-counter treatment. A forgotten tampon or other foreign body can also cause persistent irritation and discharge and needs to be removed.
A clinician can check your vaginal pH, examine discharge under a microscope, test for infections, and visually assess the skin for conditions like lichen sclerosus. Many of these causes are straightforward to diagnose and treat once someone actually looks.