Most bumps on the vulva are harmless and caused by everyday things like ingrown hairs, clogged pores, or small cysts. The vulvar area has hair follicles, oil glands, and sweat glands, all of which can become blocked or irritated. That said, some bumps do need medical attention, so knowing what to look for helps you figure out whether to wait it out or get checked.
Ingrown Hairs and Folliculitis
The single most common reason for a bump in the pubic area is an ingrown hair. When a hair curls back into the skin instead of growing outward, it creates a red, raised bump that can look and feel like a pimple. If bacteria get into the irritated follicle, it can fill with pus, swell, and become painful. This is called folliculitis.
A few things increase your risk: shaving against the direction of hair growth, using a dull razor, waxing or plucking, and friction from tight clothing rubbing against the skin. These bumps usually show up within a few days of hair removal. They tend to be small, sit right at the surface, and often have a visible hair trapped inside or just beneath the skin. Most resolve on their own within a week or two without any treatment.
Cysts Under the Skin
If your bump feels firm, round, and sits deeper below the surface, it may be a cyst. The most common type on the vulva is an epidermal inclusion cyst, sometimes mistakenly called a “sebaceous cyst.” These present as firm, round, yellow-white bumps. They form when skin cells get trapped beneath the surface and slowly accumulate, creating a small, enclosed sac. They’re painless unless they rupture or become infected, at which point they can swell significantly and become tender.
Another type, called a pilar cyst, feels smooth and mobile under the skin. You can usually push it around slightly with your finger. These are also benign, but if one ruptures, it can trigger noticeable inflammation and soreness in the area.
Bartholin’s Cysts
If the bump is near the vaginal opening, specifically on the lower left or right side, it could be a Bartholin’s cyst. The Bartholin’s glands sit on each side of the vaginal opening and produce fluid that helps with lubrication. When one of these glands gets blocked, fluid backs up and forms a cyst.
A small Bartholin’s cyst might go completely unnoticed. As it grows, you’ll feel a lump or mass near the vaginal opening. Uncomplicated cysts are usually painless or only slightly tender. The situation changes if the cyst becomes infected and turns into an abscess. At that point, the lump becomes noticeably painful, and you may have discomfort while walking, sitting, or during sex. Fever can develop with a more serious infection.
Warm sitz baths, where you sit in a few inches of warm water several times a day for three to four days, can help a small infected cyst drain on its own. If the cyst is large, very painful, or doesn’t improve with soaking, a healthcare provider can drain it.
Skin Tags
Skin tags are soft, flesh-colored flaps of skin that hang off the surface on a narrow stalk. They’re completely harmless. Unlike cysts, they don’t sit under the skin. They feel fleshy and can be wiggled around because they’re only attached at a small base. Skin tags are more common in areas with friction, which makes the vulvar region a typical spot. They don’t grow quickly, don’t hurt, and don’t need treatment unless they bother you.
STI-Related Bumps
Some bumps are caused by sexually transmitted infections, and these tend to look distinct from the types above.
Genital warts (HPV): These start as small, soft, raised bumps around 1 to 2 millimeters across. They’re round, flat, pink, and have a rough surface. Over time, they can merge into larger clusters that resemble cauliflower. On moist skin, they may ooze or bleed with pressure. Warts are not typically painful in the early stages but can become uncomfortable as they grow.
Herpes (HSV): Herpes doesn’t usually cause a single firm bump. Instead, the first sign is redness and swelling that quickly develops into a cluster of small blisters filled with clear fluid. The fluid turns cloudy, the blisters burst within a few days, and they leave behind crusted sores that heal without scarring. Before the blisters appear, you’ll often notice itching, burning, or tingling. Pain during urination and flu-like symptoms (muscle aches, mild fever, headache) can accompany the first outbreak.
Molluscum contagiosum: This viral infection causes small, raised bumps that look white, pink, or skin-colored. They feel firm and often have a distinctive dimple or dip in the center, which is the key feature that sets them apart from other bumps. Molluscum spreads through skin-to-skin contact and can appear in the genital area in adults.
Bumps During Pregnancy
If you’re pregnant and notice soft, bluish, bumpy-feeling swelling on the vulva, you may be seeing vulvar varicosities. These are essentially varicose veins of the vulva, caused by increased blood flow to the pelvis and slower blood return from the lower body during pregnancy. They can look bulging and feel bumpy, and they tend to get worse with exercise, sex, or standing for long periods. In most cases, they resolve on their own after delivery.
How to Care for a Bump at Home
For most common bumps like ingrown hairs, folliculitis, or small cysts, basic home care is enough. Keep the area clean and avoid squeezing, picking, or trying to pop the bump. Popping can push bacteria deeper into the skin and turn a minor irritation into a real infection. If the bump is tender or seems mildly inflamed, sitting in a warm sitz bath several times a day can help draw it to the surface and encourage drainage naturally.
Wear loose, breathable underwear to reduce friction. If you shave, consider switching to a sharp razor, shaving in the direction of hair growth, or trying a different hair removal method to prevent future ingrown hairs.
Signs That Need Medical Evaluation
Most vulvar bumps are benign, but certain features warrant a closer look. A bump that changes rapidly in color, border, or size needs evaluation. So does one that ulcerates (develops an open sore), bleeds persistently, or shows unusual vascular patterns like visible dark blood vessels running through it. Any lump that doesn’t respond to treatment as expected, or one that keeps coming back in the same spot, should be examined.
Postmenopausal women who develop what looks like a wart should have it biopsied rather than treated at the surface, since the risk of underlying changes is higher. The same goes for anyone with a weakened immune system, including people living with HIV or taking immunosuppressive medications, where the threshold for biopsy is lower even for bumps that look routine.
If your bump appeared after sexual contact and looks like any of the STI descriptions above, getting tested gives you a clear answer and access to treatment that can prevent spread and recurrence.