A bump on your labia is almost always caused by something common and harmless, such as a clogged gland, an ingrown hair, or a normal oil gland you’ve never noticed before. That said, bumps in this area can look and feel quite different depending on the cause, and knowing what to look for can help you figure out whether yours needs attention or will resolve on its own.
Bartholin’s Cysts
One of the most well-known causes of a labial bump is a Bartholin’s cyst. The Bartholin glands sit at the lower part of the vaginal opening, roughly at the 4 o’clock and 8 o’clock positions. They produce small amounts of fluid that help with lubrication. When one of these glands gets blocked, fluid backs up and forms a cyst, typically 2 to 4 centimeters in diameter.
A Bartholin’s cyst is usually painless unless it grows large or becomes infected. If infection sets in, it turns into an abscess: the area becomes swollen, red, and tender enough to make sitting or walking uncomfortable. These cysts account for roughly 2% of annual gynecologic visits and tend to occur in women of reproductive age. Small, painless ones sometimes go away without treatment. An abscess, however, usually needs to be drained by a healthcare provider.
Ingrown Hairs and Folliculitis
If your bump looks like a red pimple, especially after shaving or waxing, folliculitis is a likely culprit. This happens when a hair follicle gets damaged and bacteria (usually staph, which lives on skin normally) move in. Tight clothing that traps heat and moisture makes it worse. People with curly hair who shave closely are particularly prone to razor bumps in the bikini area.
These bumps are usually small, may have a white head, and can be tender to the touch. Most clear up within a few days if you stop shaving the area, keep the skin clean, and wear loose-fitting underwear. If a bump grows larger, fills with pus, or doesn’t improve after a week or so, it may have developed into a deeper infection that needs treatment.
Epidermal Cysts
Often called sebaceous cysts (though that name is technically a misnomer), epidermal inclusion cysts are the most common type of skin cyst. They form when a small piece of skin gets trapped beneath the surface, which can happen spontaneously or after minor trauma to the area. On the labia, they typically present as firm, round, yellow-white nodules that you can move slightly under the skin.
These cysts are benign and usually painless. They tend to grow slowly and can stay the same size for months or years. They only become a problem if they get infected or inflamed, at which point they may turn red, swell, and become painful. Infected cysts sometimes need to be drained, but an uninfected cyst that isn’t bothering you can generally be left alone.
Fordyce Spots
If you’ve noticed very small, pale bumps that seem to appear in groups rather than as a single lump, you may be looking at Fordyce spots. These are visible oil glands, completely normal, that sit just under the surface of the skin. They appear as white, yellowish, or skin-colored dots, typically only 1 to 3 millimeters across (about the size of a sesame seed or smaller). They become easier to see when you stretch the surrounding skin.
Fordyce spots are extremely common. An estimated 70% to 80% of adults have them somewhere on their body, and they can appear on the labia, inner cheeks, or lips. They aren’t caused by an infection and don’t need treatment. Many people simply never noticed them before and become concerned when they first spot them during a close self-exam.
Genital Warts
Genital warts are caused by certain strains of human papillomavirus (HPV). They tend to be skin-colored, with a rough, textured surface sometimes described as cauliflower-like. They’re usually painless, which means you might discover them by touch or sight rather than because they hurt. Warts can appear as a single bump or in clusters and range from tiny to several millimeters across.
Because HPV is spread through skin-to-skin contact, genital warts are considered a sexually transmitted infection. They’re treatable with topical medications or in-office procedures, but the virus itself can persist in the body. If you notice a painless, rough-textured bump that doesn’t look like a pimple or cyst, it’s worth having a provider take a look.
Genital Herpes
Herpes bumps look quite different from warts. They typically appear as a cluster of small blisters that may burst and leave behind red, open sores. The key distinguishing feature is pain: herpes lesions tend to burn, sting, or feel tender, especially during a first outbreak. You may also notice tingling or itching in the area before the blisters appear.
A first herpes outbreak is usually the most severe and can be accompanied by flu-like symptoms. Recurrent outbreaks tend to be milder and shorter. If your bump looks more like a blister than a pimple, and it’s painful or burning, herpes is one possibility to consider.
Molluscum Contagiosum
Molluscum bumps have a distinctive appearance: small, pearly-white, dome-shaped papules with a tiny dimple or dent in the center. This central indentation is the hallmark feature and helps distinguish molluscum from other types of bumps. The bumps are caused by a poxvirus and spread through direct skin contact, including sexual contact when they appear in the genital area.
They’re generally painless and may appear in small groups. Molluscum is more common in children (on other parts of the body), but in adults it frequently shows up in the genital region. The bumps often resolve on their own over several months, though treatment can speed that process.
Syphilis Chancre
A syphilis sore, called a chancre, is a small, round, firm bump that opens into an ulcer. The defining characteristic is that it’s typically painless, which can cause people to overlook it. Most people develop only one chancre, though it’s possible to get more than one. It appears at the site where the infection entered the body, so the labia is a common location.
A chancre will heal on its own within a few weeks even without treatment, but the infection doesn’t go away. It simply progresses to its next stage. Because syphilis is highly treatable in its early stages but can cause serious complications later, any painless sore that appears and doesn’t seem to be a pimple or ingrown hair warrants prompt evaluation.
Signs That Need Attention
Most labial bumps are benign, but certain features suggest something that needs a closer look. The CDC lists the following as potential warning signs of vulvar cancer: itching, burning, or bleeding on the vulva that doesn’t go away; color changes in the skin, making it look redder or whiter than normal for you; skin changes resembling a rash or warts; and sores, lumps, or ulcers that persist. Any of these symptoms lasting two weeks or longer and not resolving warrants a medical visit.
Beyond cancer, which is rare, you should also pay attention to bumps that are rapidly growing, producing foul-smelling discharge, or accompanied by fever. A bump that started small and has become increasingly painful over a day or two may be an abscess forming and could need drainage. And any new bump that appears alongside other symptoms like unusual vaginal discharge, pain during sex, or swollen lymph nodes in your groin is worth getting checked, since these can point to an infection that benefits from early treatment.