A boil on or near the vagina typically starts as a small, red bump that looks similar to a pimple. Over the next few days, it swells and becomes painful, eventually developing a white or yellow pus-filled center. Boils in this area can grow surprisingly large, sometimes reaching 2 inches or more across.
What a Vaginal Boil Looks Like at Each Stage
In its earliest stage, a vaginal boil is easy to mistake for an ingrown hair or a pimple. It appears as a firm, red bump under the skin, usually on the outer labia, the bikini line, or the crease where the thigh meets the groin. It may feel tender to the touch but otherwise look unremarkable.
Over the next several days, the bump grows. The skin around it becomes swollen, warm, and increasingly painful. This is the body’s immune response working to wall off the infection. At this point, the boil may be the size of a marble or larger, and the surrounding skin often turns a deeper red or purplish tone, especially on darker skin tones.
As the infection progresses, the boil develops a visible “head,” a white or yellow pus-filled tip at the center. This is the stage most people recognize as a classic boil. The head may eventually rupture on its own, releasing thick, sometimes blood-tinged pus. Once it drains, the pain usually drops significantly. Some boils grow as large as a golf ball before they drain, though most are smaller.
What Causes Boils in This Area
Boils form when bacteria, most commonly Staphylococcus aureus, enter a hair follicle or a tiny nick in the skin. The vulvar area is particularly prone to boils for several reasons: it’s warm, moist, and subject to friction from clothing and movement. Shaving or waxing the bikini area creates small openings in the skin where bacteria can enter. Tight underwear or workout clothes that trap sweat against the skin add to the risk.
Some people get boils once and never again. Others deal with them repeatedly. Recurring boils can sometimes signal a condition called hidradenitis suppurativa, a chronic skin condition that causes painful lumps in areas where skin rubs together. People with diabetes, weakened immune systems, or who carry staph bacteria on their skin are also more likely to develop boils.
Boil vs. Herpes vs. Bartholin Cyst
If you’ve found a bump near your vagina and aren’t sure what it is, the visual differences between common causes can help you narrow it down.
A boil is a single, round, firm bump that grows over days and eventually forms one distinct pus-filled head. It sits in or near a hair follicle, so it most often appears on the outer labia, bikini line, or inner thigh.
Genital herpes looks quite different. Herpes starts as tiny, clear or reddish fluid-filled blisters that form in clusters. They have a shiny, wet appearance before breaking open into shallow, painful ulcers with a red base and a yellowish or grayish center. They then crust over into scabs as they heal. The clustered, symmetrical pattern is a key distinguishing feature. Herpes blisters are also much smaller than a boil and rarely form a thick pus-filled head.
A Bartholin cyst is a round, solid-feeling bump that forms specifically on the labia near the vaginal opening, at roughly the 4 o’clock or 8 o’clock position. It develops when one of the two Bartholin glands (which produce lubricating fluid) becomes blocked. Unlike a boil, a Bartholin cyst often isn’t red or inflamed at first. It feels like a smooth, marble-sized lump under the skin. If the cyst becomes infected, though, it can swell, turn red, and become extremely painful, which makes it look more similar to a boil. The location is the main clue: Bartholin cysts are always at the lower sides of the vaginal opening, while boils can appear anywhere there are hair follicles.
Home Care for Small Boils
Most small boils resolve on their own within one to two weeks. The most effective home treatment is a warm compress. Soak a clean washcloth in warm water and hold it against the boil for 10 to 15 minutes, several times a day. The warmth increases blood flow to the area and encourages the boil to form a head and drain naturally. Use a fresh washcloth each time to avoid spreading bacteria.
Keep the area clean and dry between compresses. Avoid squeezing, popping, or cutting the boil yourself. Forcing it open before it’s ready can push the infection deeper into the tissue or introduce new bacteria. Wear loose, breathable cotton underwear to reduce friction and let air circulate. If the boil drains on its own, gently clean the area and cover it with a loose bandage to absorb any remaining drainage.
Signs That Need Medical Attention
A boil that grows rapidly, becomes extremely painful, or reaches the size of a golf ball may need to be drained by a healthcare provider. This is a quick in-office procedure where the boil is numbed and a small incision allows the pus to drain completely. Sometimes a course of antibiotics is prescribed alongside drainage, especially if the surrounding skin is red and spreading.
You should seek care if a boil causes a fever, hasn’t improved after two weeks of home care, or keeps coming back. Multiple boils appearing at the same time, a condition called a carbuncle, also warrants a visit. People with carbuncles often feel generally unwell and may develop fever and chills, which signals the infection may be spreading beyond the skin.
Reducing the Chance of Recurrence
If you’re prone to boils in the vulvar area, a few targeted habits can lower the frequency. Switch to a fresh razor for each shave, or consider trimming instead of shaving to avoid the tiny skin nicks that let bacteria in. Wear cotton underwear and change out of sweaty workout clothes promptly. Wash the area daily with a gentle, fragrance-free cleanser. Avoid sharing towels or razors, since staph bacteria transfer easily through shared personal items. If boils keep returning despite these steps, a healthcare provider can test for bacterial colonization and recommend a targeted treatment plan to break the cycle.