Do Bartholin Cysts Bleed and What Does It Mean?

A typical Bartholin cyst does not bleed on its own. These cysts form when mucus builds up behind a blocked duct, producing a fluid-filled swelling near the vaginal opening that usually contains clear or whitish secretion, not blood. When bleeding does appear in or around a Bartholin cyst, it signals something beyond the ordinary blockage and warrants a closer look. The causes range from mundane (a blood vessel nicked during drainage) to uncommon but important conditions that mimic a simple cyst.

How Bartholin Cysts Form and Why They Rarely Involve Blood

The Bartholin glands sit on either side of the vaginal opening and produce small amounts of mucus that help with lubrication. When the duct draining one of these glands gets blocked, mucus continues to accumulate behind the obstruction, and the duct swells into a cyst. The blockage can result from inflammation, infection, trauma, or sometimes no identifiable cause at all.¹ About 2% of women of reproductive age develop one at some point.²

Because the cyst contents are mucus, not tissue with a rich blood supply, bleeding is not part of the normal presentation. Small cysts often go unnoticed entirely. Larger ones may cause discomfort, a sense of pressure, or pain during walking or intercourse, but the lump itself stays contained within its own walls. If a cyst becomes infected and progresses to an abscess, the contents turn purulent, but even then, frank blood is unusual. So if you notice blood in or around what you think is a Bartholin cyst, it’s worth understanding what else could be going on.

When a Bartholin Cyst Does Bleed

The most common scenario for bleeding is during a medical procedure. When a cyst or abscess is incised and drained, the surrounding tissue can bleed, and occasionally a blood vessel within or near the cyst wall gets cut. This is expected, typically minor, and managed on the spot. In one comparative study of CO₂ laser treatment versus traditional surgery for Bartholin cysts, roughly 6% of patients in the laser group and about 15% in the traditional surgery group needed a stitch to control bleeding during the procedure.³ That kind of procedural bleeding is routine and resolves quickly.

Spontaneous bleeding inside a Bartholin cyst, though, is genuinely uncommon. A published case report described an 84-year-old woman on the antiplatelet medication clopidogrel who presented with a painful vulvar swelling. When the cyst was opened, bright-red blood and blood clots drained out instead of the expected mucus. The authors specifically flagged that older women taking blood-thinning medications should be aware of the possibility of a hemorrhagic Bartholin cyst.⁴ Antiplatelet and anticoagulant drugs reduce the blood’s ability to clot, so even a small amount of bleeding inside the cyst wall can accumulate rather than seal off on its own.

Another documented scenario is a cyst-hematoma, where blood collects in the gland itself and becomes encapsulated. In one case, a 55-year-old patient’s Bartholin mass turned out on surgical exploration and histological examination to be a cystic hematoma of the Bartholin gland rather than a simple mucus-filled cyst.⁵ These cases are unusual enough to be individually written up in the medical literature, which gives you a sense of how rarely they occur.

Conditions That Mimic a Bartholin Cyst and Do Involve Bleeding

A more important concern than whether the cyst itself is bleeding is whether the lump is actually a Bartholin cyst at all. Several other conditions can produce a mass in the same anatomical location, and some of these involve blood as a defining feature.

Vulvar Hematoma

A vulvar hematoma is a collection of blood in the soft tissue of the vulva, often caused by a fall, straddle injury, or sexual trauma. Because the blood can pool in the same area where Bartholin cysts appear, the two are sometimes confused. Case reports describe vulvar hematomas initially believed to be Bartholin cysts or abscesses until surgery revealed a mass of clotted blood instead of mucus or pus.⁶ The distinction matters because the treatment differs; a hematoma may need to be evacuated and the bleeding vessel identified, while a Bartholin cyst is managed with drainage and sometimes a catheter to keep the new opening patent.⁷

If a vulvar lump appeared after a specific injury, grew rapidly, feels firm rather than fluctuant, or the overlying skin is bruised or discolored, a hematoma is more likely than a Bartholin cyst. The timing and circumstances usually give the biggest clue.

Endometriosis in the Bartholin Gland

Endometriosis can, in rare cases, involve the Bartholin gland or nearby tissue. When it does, the presentation can look identical to a simple Bartholin cyst on physical exam but with one key difference: the symptoms tend to vary with the menstrual cycle. A woman with Bartholin gland endometriosis might notice the lump swelling or becoming more painful around her period. In one reported case, marsupialization of what was thought to be a standard cyst produced a “chocolate-colored fluid,” the hallmark of old blood associated with endometriosis. Pathological examination confirmed endometrial-type tissue with hemosiderin pigments inside the gland.⁸

The takeaway here is that dark or brownish fluid draining from a Bartholin area mass is not typical for a standard cyst or an abscess. It suggests trapped old blood, and endometriosis should be on the list of possibilities, particularly if the mass changes in size or tenderness in sync with menstrual periods.⁹ Ultrasound can sometimes pick up features suggestive of endometriosis, but histological examination of the tissue after removal is what confirms the diagnosis.¹⁰

Bartholin Gland Cancer

This is the diagnosis no one wants to hear, and the good news is that it is exceedingly rare. Still, it exists, and bleeding is one of its possible symptoms. Bartholin gland tumors generally show up as a painless lump in the posterior half of the vulva, but they can also cause itching and bleeding.¹¹ The concern about cancer is often raised in postmenopausal women specifically, since Bartholin cysts are more common during the reproductive years. One study found the incidence of Bartholin gland cancer at roughly 0.114 per 100,000 woman-years in postmenopausal women, compared with 0.023 per 100,000 woman-years before menopause. Despite the roughly fivefold higher rate in older women, the absolute risk remains extremely low. The authors concluded that routine excision of every Bartholin gland mass in postmenopausal women was not justified; drainage with selective biopsy was considered sufficient as an initial approach.¹²

So while a biopsy is a reasonable step when a Bartholin mass in a postmenopausal woman has atypical features like bleeding, hardness, rapid growth, or fixation to surrounding tissue, the odds are still overwhelmingly in favor of something benign.

The Role of Infection

Infection is the most common complication of a Bartholin cyst and often the reason people seek care in the first place. An infected cyst becomes an abscess: red, swollen, hot, and intensely painful. Abscesses may drain pus, and that pus can occasionally be tinged with blood, particularly if the tissue around the cyst is inflamed and friable. But pus-tinged-with-blood is different from frank bleeding. The blood in that scenario comes from irritated, inflamed tissue at the surface rather than from inside the cyst cavity itself.

As for what causes infection, the mix of organisms found in Bartholin abscesses includes both common skin bacteria and sexually transmitted infections. One study found that 10% of patients with a Bartholin cyst or abscess tested positive for gonorrhea, compared with 3% of those without one, and gonorrhea was the only sexually transmitted infection statistically associated with Bartholin cyst formation on regression analysis.¹³ Chlamydia and trichomoniasis were found at similar rates in patients with and without Bartholin cysts. So while Bartholin abscesses are not automatically a sign of an STI, testing is reasonable if an abscess develops.

What Color Drainage Actually Tells You

When a Bartholin cyst or abscess is opened, whether spontaneously or by a clinician, the fluid color gives useful diagnostic clues:

Clear or whitish: Typical mucus from a simple, uncomplicated cyst. This is the expected finding and the least concerning.
Yellow-green, cloudy, or foul-smelling: Suggestive of infection (abscess). Often accompanied by significant pain, warmth, and redness.
Bright red with clots: Hemorrhagic cyst, possibly related to blood-thinning medications or a vascular injury. The case described above in the elderly woman on clopidogrel is the textbook example.⁴
Dark brown or “chocolate-colored”: Old blood, raising the possibility of endometriosis involving the gland.⁸

None of these colors guarantee a specific diagnosis, but they help clinicians decide which additional testing or follow-up to order. If you notice bloody or unusually colored discharge from a vulvar lump at home, make a note of the color and amount. That information is genuinely useful for your doctor.

Imaging When Things Look Atypical

Most Bartholin cysts are diagnosed by physical examination alone. A clinician who feels a soft, fluctuant mass near the vaginal opening in the right location doesn’t usually need imaging. But when the presentation is atypical, imaging can help distinguish a cyst from something more complex. Transperineal ultrasound can characterize whether a mass is purely cystic or contains solid or heterogeneous components, and MRI provides detailed information about the extent and relationship to surrounding structures. In a case involving an unusually large Bartholin cyst in a postmenopausal woman, ultrasound showed a cystic lesion with heterogeneous internal echoes and no internal blood flow, while MRI confirmed a well-circumscribed cystic mass measuring roughly 6 cm with no invasion of adjacent structures or enlarged lymph nodes. The authors emphasized that even with reassuring imaging, histopathological confirmation remains essential in atypical presentations to rule out malignancy.¹⁴

For most reproductive-age women with a straightforward presentation, imaging is unnecessary and would just add cost and delay. Imaging earns its place when the mass is unusually large, solid, fixed, recurrent after treatment, or accompanied by bleeding in a postmenopausal patient.

Bartholin Cysts During Pregnancy

Pregnancy is one setting where a Bartholin mass draws extra attention, because treatment options are somewhat more constrained and there’s natural anxiety about anything happening near the birth canal. Bartholin gland abscesses do occur during pregnancy: one study of 40 pregnant patients found an incidence of about 0.13%. Most abscesses appeared in the second trimester, and women who had experienced a Bartholin abscess before pregnancy were more likely to develop one again during pregnancy (55% had a prior history, compared with 30% of non-pregnant patients).¹⁵

Bleeding from a Bartholin cyst during pregnancy is no more likely than at other times, but it is understandably more alarming. Any vulvar bleeding during pregnancy should be evaluated promptly, partly because the vulvar blood supply increases substantially during pregnancy, meaning that even a minor issue can produce more bleeding than it otherwise would. Treatment of a Bartholin abscess during pregnancy generally follows the same principles as outside of pregnancy: drainage, often with a Word catheter to keep the tract open, and antibiotics if infection is present. The reassuring finding from the pregnancy-specific data is that the condition is manageable and does not inherently threaten the pregnancy.

What Treatment Looks Like and How Bleeding Factors In

Small, painless Bartholin cysts often don’t need any treatment. Sitz baths (sitting in a few inches of warm water) may encourage a cyst to drain on its own. When a cyst is large, painful, or has become an abscess, several procedural options exist. Marsupialization, where a surgeon makes a small incision in the cyst and sutures the edges open to create a permanent drainage tract, is one of the most common approaches. Placement of a Word catheter, a small inflatable balloon left in the cyst cavity for several weeks to keep it from closing, is another. CO₂ laser vaporization of the cyst wall is a newer alternative that allows faster return to daily activity (an average of about 2 days compared with roughly 14 days for traditional surgery) and produces fewer complications, including less bleeding at the time of the procedure.³

In terms of quality of life, treatment does make a difference. One study found that pain and discomfort during sexual activity decreased significantly from initial presentation to end of treatment, and mental health scores improved as well.¹⁶ If bleeding is a feature of your Bartholin cyst, your clinician will factor that into the choice of procedure. For example, if you’re on blood thinners, they may coordinate with the prescribing doctor about temporarily adjusting the medication, or opt for a technique associated with less procedural bleeding.

When to See a Doctor

Most Bartholin cysts don’t need emergency care. But certain features should prompt you to get evaluated sooner rather than later:

Visible blood: Whether it’s bright red, dark, or mixed with pus, blood from a vulvar lump is not typical for a simple cyst and needs evaluation.
Rapid growth or hardness: A mass that grows quickly, feels solid rather than squishy, or seems fixed in place may need imaging and biopsy.
Postmenopausal onset: A new Bartholin area mass after menopause deserves more thorough workup because the differential diagnosis is wider, even though malignancy remains rare.
Severe pain with fever: This combination suggests an abscess that may need drainage and antibiotics rather than watchful waiting.
Cyclical symptoms: Swelling or pain that worsens predictably with your period could point to endometriosis rather than a simple cyst.
Recurrence after treatment: Cysts that keep coming back may benefit from a different management approach or further investigation.

If you’re on anticoagulant or antiplatelet medications and develop a Bartholin cyst, mention the medications to your clinician even if the cyst seems straightforward. The hemorrhagic cyst case described earlier involved a patient whose medication status directly affected what was found inside the cyst and how it was managed.⁴ Clinicians make better decisions when they have the full picture, and bleeding risk from medications is an easy thing to overlook if you don’t connect it to a gynecological issue.

1
The Journal of Sexual Medicine. Marsupialization of the Bartholin Duct Cyst and Recanalization for Symptomatic Recurrent Bartholin Cysts
2
Cuestiones de Fisioterapia. Bartholin Cysts: A Mini Review of Etiology, Diagnosis, And Modern Treatment Modalities
3
PubMed. Complication and recurrence rate in laser CO2 versus traditional surgery in the treatment of Bartholin’s gland cyst
4
PubMed Central. Hemorrhagic Bartholin’s cyst in a woman using anti-platelet medication: A case report and review of the literature
5
PubMed Central. Encapsulated Hematoma of the Bartholin’s Glandule
6
PubMed. Traumatic vulvar hematoma masquerading as a bartholin duct cyst in a postmenopausal woman
7
The Journal of Emergency Medicine. A nonpuerperal traumatic vulvar hematoma
8
PubMed Central. Endometriosis of the Bartholin gland: a case report and review of the literature
9
European Journal of Obstetrics & Gynecology and Reproductive Biology. Endometriosis in the Bartholin gland
10
PubMed Central. Premenstrual inguinal swelling and pain caused by endometriosis in the Bartholin gland: a case report
11
Best Practice & Research Clinical Obstetrics & Gynaecology. Bartholin’s gland carcinoma, malignant melanoma and other rare tumours of the vulva
12
PubMed. Postmenopausal bartholin gland enlargement: a hospital-based cancer risk assessment
13
PubMed. Association of Bartholin cysts and abscesses and sexually transmitted infections
14
Case Reports in Radiology. Diagnostic Challenges of an Unusually Large Bartholin Duct Cyst in a Postmenopausal Woman: Clinical, Ultrasound, MRI, and Histopathological Correlation
15
PubMed. Bartholin gland abscess during pregnancy: Report on 40 patients
16
European Journal of Obstetrics & Gynecology and Reproductive Biology. Quality of life and sexual activity during treatment of Bartholin’s cyst or abscess with a Word catheter