A Bartholin cyst is almost always harmless. These fluid-filled lumps form when one of the two small glands near the vaginal opening becomes blocked, and most are painless, require no treatment, and resolve on their own. The real concern isn’t the cyst itself but what it can become: an infected abscess, or in rare cases, a sign of something more serious in women over 40.
Most Bartholin Cysts Are Not Dangerous
The Bartholin glands sit on either side of the vaginal opening and produce small amounts of lubricating fluid. When a duct gets blocked, fluid backs up and forms a cyst. Small cysts under 1 cm are extremely common and often go completely unnoticed. Even larger ones, which can range from 1 to 5 cm (roughly pea-sized to egg-sized), are typically painless until they reach several centimeters. At that point you might feel pressure or discomfort while sitting or during sex, but the cyst itself still isn’t dangerous.
Cysts that have been present for years without changing in appearance don’t need removal or biopsy unless they’re causing symptoms. Many women discover them incidentally and never need any intervention at all.
When a Cyst Becomes an Abscess
The most common complication is infection. When bacteria enter a blocked Bartholin gland, the cyst can fill with pus and become an abscess. This is painful, often intensely so. The area becomes swollen, red, warm to the touch, and may develop surrounding cellulitis (spreading skin infection). Common bacteria involved include E. coli and, less frequently, the organisms that cause gonorrhea and chlamydia.
An abscess is not a medical emergency in most cases, but it does need treatment. It won’t resolve with home care alone once it’s fully formed. The standard approach involves draining the abscess and placing a small balloon catheter (called a Word catheter) to keep the new drainage channel open while it heals. Another option is marsupialization, a minor surgical procedure that creates a permanent opening. A 2024 meta-analysis found recurrence rates of about 7.6% with the catheter and 9.4% with marsupialization, meaning both approaches work equally well.
The situation becomes more serious if infection spreads beyond the gland. Fever is the key warning sign that an abscess has progressed to a systemic infection. If you develop a fever alongside a painful vulvar lump, that warrants prompt medical attention, as antibiotics and drainage are both needed at that stage.
The Cancer Question for Women Over 40
This is the concern that brings many people to search whether a Bartholin cyst is “dangerous.” Bartholin gland cancer exists, but it is rare. The issue is that a cancerous growth can initially look and feel like an ordinary cyst. For this reason, many experts recommend biopsy for any new Bartholin gland mass in women 40 and older, or in postmenopausal women. A mass that feels solid or fixed rather than soft and fluid-filled, or one that doesn’t respond to standard treatment, also raises suspicion.
If you’re under 40, the chance of a Bartholin gland mass being cancerous is extremely low. Routine biopsy isn’t typically recommended for younger women with a straightforward, fluid-filled cyst.
Conditions That Can Mimic a Bartholin Cyst
Not every lump near the vaginal opening is a Bartholin cyst. Vulvar folliculitis, which is essentially a pimple on a hair follicle, causes small painful bumps but looks more like acne with multiple small pustules spread across the skin. A vulvar hematoma (a collection of blood under the skin, sometimes after childbirth or injury) can be mistaken for a Bartholin abscess but typically develops within hours rather than days. Vulvar cancer usually presents as an itchy, painless lump that may appear ulcerated or warty, which is quite different from the smooth, round, tender swelling of an infected Bartholin gland.
What You Can Do at Home
For a small, mildly uncomfortable cyst that isn’t infected, warm sitz baths are the standard first-line approach. Sit in a few inches of warm water for 15 to 20 minutes, three to four times a day. The warmth encourages the blocked duct to open and drain naturally. Many cysts resolve within a few days with this approach alone.
If the cyst is growing, becoming increasingly painful, or showing signs of infection (redness, warmth, swelling that spreads beyond the lump), sitz baths alone won’t be enough. Likewise, any lump that persists for weeks without improvement is worth having examined, not because it’s likely dangerous, but because treatment is straightforward and waiting only prolongs discomfort.