What Does Fibroid Tissue Discharge Look Like?

Fibroid tissue discharge typically appears as firm, fleshy, pinkish-gray or whitish chunks of tissue passed through the vagina, often accompanied by watery or blood-tinged fluid. The pieces can range from small, shredded fragments to large, rubbery masses several centimeters across, and the process sometimes comes with a foul-smelling watery discharge that can persist for days or weeks. What you actually see depends heavily on whether the tissue is passing on its own or after a medical procedure, what kind of degeneration the fibroid has undergone, and how large the original growth was.

What Fibroid Tissue Actually Is

Fibroids are made up of two main components: smooth-muscle cells and a dense scaffolding of collagen that those cells produce around themselves.¹ That collagenous matrix is what gives a fibroid its characteristic firm, rubbery texture, and it is also why expelled tissue feels distinctly different from a blood clot or normal menstrual tissue. When fibroid tissue passes vaginally, it tends to hold its shape better than a clot would. Clots are soft, dark red, and jelly-like. Fibroid fragments are stiffer, lighter in color, and often have a more three-dimensional structure. Some women describe them as resembling pieces of raw meat or gristle.

The color and texture shift depending on what has happened inside the fibroid before it came out. Most fibroids that have been cut off from their blood supply undergo a form of breakdown called degeneration. The most common type, hyaline degeneration, occurs in over 60% of fibroids and replaces the muscle tissue with a glassy, pale material. Less commonly, fibroids undergo cystic degeneration (about 4% of cases), which creates fluid-filled pockets, or red degeneration, which produces a reddish-brown, hemorrhagic appearance. Some fibroids also show areas of calcification.² In practice, this means the tissue you pass might look whitish and waxy, brownish-red and mushy, or mottled with patches of different colors. It is rarely one uniform shade.

Why Fibroid Tissue Gets Expelled

Fibroid tissue does not normally leave the body on its own. A fibroid sitting deep in the uterine wall can degenerate quietly over months or years and simply shrink in place without you ever noticing. Expulsion happens when a fibroid has a direct route to the uterine cavity, meaning it either bulges into the cavity already or migrates there as it breaks down. This is most common with submucosal fibroids, which grow just beneath the inner lining of the uterus, and with pedunculated fibroids that hang from a stalk into the cavity.

Spontaneous expulsion without any prior treatment is uncommon but does occur. Far more often, tissue discharge happens after a procedure that deliberately cuts off the fibroid’s blood supply or destroys its cells, causing the dead tissue to detach and slough out through the cervix. The two procedures most associated with fibroid expulsion are uterine artery embolization (UAE) and radiofrequency ablation.

Discharge After Uterine Artery Embolization

UAE works by blocking the arteries that feed a fibroid, starving it of oxygen and nutrients. The fibroid then dies, shrinks, and in some cases separates from the uterine wall entirely. When a dead fibroid drops into the uterine cavity and passes through the cervix, that is expulsion. It is recognized as a non-life-threatening complication of the procedure.³

The timeline varies widely. Some women pass tissue within weeks of the procedure; others do not experience expulsion for months. One case report documented a large submucosal fibroid, measuring roughly 10 by 8 centimeters, that was seen on imaging protruding into the cervical canal six months after UAE, on the verge of expelling.⁴ When a fibroid that size comes out, it can happen gradually over days, with fragments passing bit by bit, or it can come out as one large mass that causes significant cramping and pressure during passage.

The discharge surrounding an expelling fibroid after UAE is often described as watery, brownish, and foul-smelling. The odor comes from necrotic tissue, the dead cells that make up the bulk of the mass. Some women mistake it for an infection because the smell can be quite strong, but the odor of necrotic tissue and the odor of an actual infection can overlap, which is exactly why you should not try to diagnose the cause at home.

Discharge After Radiofrequency Ablation

A newer class of procedures uses radiofrequency energy delivered directly into the fibroid to heat and destroy its tissue from within. After ablation, the treated fibroid gradually breaks down and may be reabsorbed by the body or, if it sits close to the uterine lining, slough out vaginally. In one reported case, a woman in her 40s developed watery discharge described as sloughing about three months after transcervical radiofrequency ablation of a submucosal fibroid.⁵

This watery, sometimes tissue-streaked discharge can be startling because it comes weeks or months after the procedure, long after the patient expected recovery to be over. Submucosal fibroids and pedunculated subserosal fibroids carry a higher risk of necrosis with expulsion after these kinds of minimally invasive treatments, which is why some guidelines consider them poor candidates for certain ablation and embolization techniques.⁶

How to Tell It Apart from Other Types of Discharge

Abnormal vaginal discharge is one of the most common reasons women visit a doctor, and the causes range from infections to hormonal shifts to structural problems like fibroids.⁷ Telling fibroid tissue apart from other kinds of discharge is not always straightforward, but there are some distinguishing features.

• Blood clots: These are dark red to maroon, soft, and jelly-like. They flatten easily when pressed. Fibroid tissue is firmer, lighter in color, and holds its shape.
• Decidual cast: This is a rare event where the entire uterine lining sheds in one piece, producing a triangular-shaped membrane. It looks like a thin, fleshy mold of the uterine cavity, quite different from the dense, chunky appearance of fibroid tissue.
• Infectious discharge: Bacterial vaginosis, yeast infections, and sexually transmitted infections produce liquid discharge that may be white, yellow, green, or gray, often with a distinct odor. There are no solid tissue fragments. If you are passing solid pieces alongside watery or foul-smelling fluid, infection alone is unlikely to explain it.
• Endometrial tissue: During a normal period, small fragments of endometrial lining can pass, but these are thin, soft, and membrane-like. Fibroid fragments are noticeably thicker and more solid.

The most reliable clue is context. If you recently had UAE or ablation and you start passing firm tissue with watery, odorous discharge weeks to months later, fibroid expulsion is the leading explanation. If you have not had a procedure and you are passing unusual tissue, the cause is less certain and warrants prompt evaluation.

When Expulsion Becomes an Emergency

Most fibroid expulsions, while unpleasant, resolve without serious complications. The tissue passes, the discharge tapers off, and the body heals. But there are situations where things go wrong, and knowing the warning signs matters.

Heavy bleeding that soaks through a pad in under an hour, or that continues at that rate for more than a couple of hours, needs medical attention. A large fibroid that gets stuck partway through the cervix can cause intense cramping, ongoing bleeding, and sometimes infection. Fever above 38°C (100.4°F), chills, or rapidly worsening pelvic pain after passing tissue all suggest infection of the uterine cavity, which can escalate quickly. Foul-smelling discharge on its own is ambiguous since necrotic tissue smells bad regardless, but foul-smelling discharge combined with fever is a much clearer signal.

Women who have had UAE and experience these symptoms should contact their interventional radiologist or gynecologist rather than waiting. Post-embolization syndrome, a constellation of pain, fever, and malaise, is common in the first week after the procedure and is usually self-limiting. But when those symptoms appear weeks or months later alongside tissue discharge, the picture is different and may need imaging or antibiotics.

What UAE Patients Can Expect in Terms of Symptoms

Because UAE is the procedure most commonly linked to fibroid expulsion, it helps to understand the broader symptom picture. In early studies of the technique, roughly nine out of ten patients reported improved menstrual bleeding afterward, with about four out of five describing moderate to marked improvement. Pelvic pain and pressure improved in an even higher proportion.⁸ Those are the intended benefits. The tradeoff is that the process of a fibroid dying and potentially expelling can itself produce weeks of cramping, spotting, and discharge that many women are not prepared for.

This interim phase, between the procedure and the resolution of symptoms, is often the most distressing part. Ongoing brownish or pinkish discharge, intermittent cramping, and the passage of small fragments can persist for weeks. If you are in this window, keeping a log of what you pass, how much you bleed, and whether you develop any fever can help your doctor distinguish expected healing from a complication that needs intervention.

Can a Fibroid Expel on Its Own Without Treatment?

It can happen, though it is uncommon. A submucosal fibroid that undergoes spontaneous degeneration, particularly red degeneration during pregnancy or hyaline degeneration over time, may detach from its base and drop into the uterine cavity. Pedunculated submucosal fibroids, which hang by a narrow stalk, are especially prone to this because the stalk can twist, cutting off blood supply and leading to death of the tissue. When the stalk eventually gives way, the fibroid falls free and passes through the cervix.

Spontaneous expulsion tends to cause sudden onset of severe cramping, often mimicking labor contractions, along with heavy bleeding and a sensation of pressure in the pelvis or vagina. Some women feel something physically moving through the cervix. The tissue that comes out is generally a single, rounded or lobulated mass that can be surprisingly large, sometimes the size of a plum or even larger. Unlike the gradual, piecemeal expulsion that often follows UAE, spontaneous expulsion tends to happen more quickly, though the discharge afterward can linger for a week or more.

When Tissue Discharge Warrants Pathology Testing

Not every piece of tissue that passes vaginally is a fibroid. Uterine sarcomas, which are rare cancers that can grow inside the uterus, sometimes look like fibroids on imaging and can present with unusual bleeding or tissue discharge. A study comparing women with sarcomas to women with fibroids found that sarcoma patients tended to be older (average age around 62 compared to about 47 for fibroids), were far more likely to be postmenopausal, and were more likely to have a solitary uterine mass rather than multiple fibroids.⁹

This does not mean that passing tissue automatically raises concern for cancer. The overwhelming majority of uterine masses are benign fibroids. But if you are postmenopausal, have never been diagnosed with fibroids, have a rapidly growing uterine mass, or pass tissue that looks unusual, sending the specimen to pathology is a reasonable precaution. Your doctor can arrange this, and it is a straightforward process. If you do pass a large piece of tissue at home, placing it in a clean container and bringing it to your appointment is often helpful, even though the idea is understandably unappealing.

What the Discharge Smells Like and Why

One of the most distressing aspects of fibroid expulsion is the odor. Necrotic tissue, tissue that has died and is breaking down, produces a distinctly unpleasant smell that many women describe as musty, rotten, or similar to decaying meat. This is a normal byproduct of cellular death and does not automatically indicate infection. The proteins in the dead muscle and collagen are being broken down by the body’s own enzymes and by bacteria normally present in the vagina, and that process creates volatile compounds that smell bad.

The odor can persist for as long as the tissue is actively breaking down and sloughing, which may be days to several weeks. Wearing a pad rather than a tampon is generally recommended during this period, both for comfort and because tampons can introduce bacteria into a uterine cavity that may be partially open from the passage of tissue. If the smell changes character, especially if it becomes sharply foul alongside fever or increasingly heavy bleeding, that shift is worth reporting to your doctor, as it may signal a secondary infection layered on top of the normal necrotic process.

Fibroids That Degenerate Without Ever Leaving the Body

For every fibroid that expels, many more degenerate in place and never produce any noticeable discharge. Intramural fibroids, which sit embedded in the muscular wall of the uterus, can undergo the same types of degeneration described earlier: hyaline, cystic, myxoid, red, or even calcification.² But because they have no pathway to the uterine cavity, their breakdown products are simply reabsorbed by surrounding tissue over time. You might experience pain during active degeneration, especially with red degeneration, which tends to come on suddenly and can be quite severe, but there will be no tissue discharge vaginally.

This is an important distinction because many women with known fibroids worry about any unusual vaginal discharge and wonder whether a fibroid is “coming out.” If your fibroids are intramural or subserosal, visible on an ultrasound sitting within or on the outside of the uterine wall, the odds of vaginal expulsion are very low. The fibroids most likely to expel are submucosal ones that protrude into the uterine cavity, particularly after a procedure that kills their blood supply.