A bump on your vaginal lip (the labia) is almost always caused by something common and treatable, like an ingrown hair, a clogged gland, or a small cyst. The vulvar skin contains hair follicles, oil glands, and sweat glands, all of which can become blocked or irritated. Less often, bumps are caused by infections like herpes or HPV, or by completely normal skin variations that don’t need treatment at all.
The key to figuring out what you’re dealing with is the bump’s size, texture, location, and whether it hurts. Here’s what each common cause looks like.
Ingrown Hairs and Folliculitis
This is the most common reason for a bump on the labia, especially if you shave, wax, or wear tight clothing. When a hair curls back into the skin instead of growing outward, it creates a small, red, pimple-like bump. If the hair follicle also gets infected with bacteria, that’s folliculitis, and it can look angrier and more swollen.
Ingrown hairs appear as single, isolated bumps rather than clusters. They often have a visible pimple-like head, and if you look closely, you may see a shadow or thin line in the center of the bump where the trapped hair sits. If the bump ruptures or is squeezed, it typically produces white pus. These features distinguish an ingrown hair from a herpes blister, which appears as a cluster of tiny, watery sores (usually under 2 millimeters each) that release yellow discharge when they rupture.
Most ingrown hairs resolve on their own within a week or two. A warm compress applied for 10 to 15 minutes a few times a day can help draw the hair to the surface. Resist the urge to dig at it with tweezers, which can introduce bacteria and make things worse.
Bartholin’s Cysts
The Bartholin glands sit on either side of the vaginal opening, near the lower portion of the labia. Their job is to produce fluid that helps with lubrication. When the duct of one of these glands gets blocked, fluid backs up and forms a cyst.
Bartholin’s cysts can range from pea-sized to as large as a golf ball. A small one may be completely painless, just a firm, round lump you notice in the shower or while wiping. Larger ones can cause a feeling of pressure or discomfort when you sit or walk. The real problem starts if the cyst becomes infected and turns into an abscess. An infected Bartholin’s cyst is painful, swollen, warm to the touch, and may make it difficult to sit comfortably.
Warm sitz baths (soaking the area in a few inches of warm water for 15 to 20 minutes, three to four times a day) can sometimes encourage a small cyst to drain on its own. If the cyst is large, very painful, or infected, a healthcare provider can drain it with a small procedure.
Fordyce Spots and Normal Anatomy
Not every bump is a problem. Fordyce spots are tiny, painless, slightly raised dots that appear on the labia, inner cheeks of the mouth, and other mucosal skin. They’re simply oil glands that are visible through the skin’s surface, typically 1 to 3 millimeters across (about the size of a sesame seed or smaller). Between 70% and 80% of adults have them. They don’t itch, don’t grow, and don’t need treatment.
Similarly, vestibular papillomatosis refers to small, finger-like projections that sometimes appear on the inner labia or around the vaginal opening. These are a normal anatomical variation, not warts, though they can be mistaken for them. The key difference is that vestibular papillae are soft, evenly spaced, and each one has its own individual base. Warts tend to be irregularly shaped and cluster together.
Sebaceous and Epidermoid Cysts
These are round, firm lumps that sit just under the skin. They form when skin cells or oil get trapped beneath the surface, and they’re quite common on the labia because the area is rich in oil-producing glands. They feel smooth and mobile, meaning you can shift them slightly under your finger. Some have a small central opening (called a punctum) visible on the surface.
These cysts are usually painless unless they become inflamed or infected, at which point they turn red, tender, and swollen. Left alone, many stay small and cause no trouble for years. Do not try to squeeze or pop a cyst yourself. This often pushes the contents deeper into the tissue and can cause infection.
Genital Warts (HPV)
Genital warts caused by certain strains of HPV appear as small, skin-colored bumps on the labia, around the vaginal opening, or near the anus. A single wart can look like a tiny, soft, raised bump. When several grow close together, they take on a rough, cauliflower-like texture. They’re usually painless, though they can occasionally itch.
Warts can appear weeks or even months after sexual contact with someone who carries HPV, which makes it hard to trace exactly when exposure happened. They won’t go away with warm compresses or home treatment. A healthcare provider can remove them with topical treatments, freezing, or minor procedures, though the virus itself may remain in the body even after the warts are gone.
Genital Herpes
Herpes bumps look different from most other causes. They start as a cluster of tiny, fluid-filled blisters, usually under 2 millimeters each, that appear close together rather than as a single isolated bump. Before the blisters appear, you may notice tingling, burning, or itching in the area. The blisters eventually break open into shallow, painful sores that crust over and heal within a few weeks.
A first outbreak is typically the most painful and may come with flu-like symptoms such as body aches and swollen lymph nodes near the groin. If what you’re seeing is a single, firm, pimple-like bump with no burning or tingling, herpes is less likely. But because herpes can sometimes look atypical, testing is the only way to know for sure.
Molluscum Contagiosum
Molluscum is a viral skin infection that produces small, dome-shaped bumps with a distinctive dimple or dent in the center. If you press on one, it may release a white, cheesy material from that central depression. The bumps are usually flesh-colored, firm, and painless, and they can appear in small groups.
Molluscum spreads through skin-to-skin contact, including sexual contact. The bumps often clear on their own over several months, though treatment can speed the process.
Hidradenitis Suppurativa
If you get painful bumps in the groin or labia repeatedly, particularly deep, tender nodules that sometimes drain fluid and leave scars, you may be dealing with hidradenitis suppurativa. This is a chronic inflammatory condition affecting the sweat glands, and it tends to flare in areas where skin rubs together: the groin, under the breasts, and in the armpits.
The bumps can look like boils or deep acne, and they often recur in the same spots. This condition is frequently misdiagnosed as regular boils or ingrown hairs for years before it’s properly identified. If you notice a pattern of recurring, painful lumps that leave tunnels or scars under the skin, it’s worth bringing up with a provider specifically.
Signs That Need Medical Attention
Most vulvar bumps are harmless. But certain features warrant a closer look. A bump that grows steadily over weeks, doesn’t heal, bleeds without reason, or changes color could, in rare cases, indicate something more serious like vulvar cancer. Persistent itching that doesn’t respond to basic measures is another signal that shouldn’t be ignored. Taking photos of any skin changes you notice before your appointment can help your provider assess what’s happening.
You should also get evaluated if a bump is accompanied by fever, significant swelling and tenderness (signs of infection), pelvic pain, or unusual vaginal discharge. Infected cysts can become extremely swollen and painful and sometimes need to be drained. And any bump you’re unsure about is worth having checked, even if it turns out to be nothing. A quick visual exam or simple test can give you a clear answer.