Can Uterine Fibroids Cause Bowel Problems?

Uterine fibroids can and do cause bowel problems, ranging from everyday nuisances like constipation and bloating to rare but serious complications like bowel obstruction. Fibroids affect the bowel primarily through physical pressure: as they grow, they can push against the intestines and rectum, disrupting normal function. The severity depends heavily on where the fibroid sits and how large it gets, which is why some people with fibroids never notice a single digestive symptom while others deal with chronic discomfort or, in extreme cases, a surgical emergency.

How Fibroids Physically Interfere With Bowel Function

The uterus sits directly in front of the rectum and near loops of the small intestine. When fibroids grow outward from the uterine wall, they can press on these structures and change how the bowel operates. A systematic review noted that fibroids cause symptoms in up to half of women who have them, and the list includes not just heavy bleeding and pelvic pain but also bowel dysfunction and bladder problems grouped under the umbrella of “bulk symptoms.”¹ Bulk symptoms are the result of the fibroid physically occupying space and leaning on whatever is nearby.

The type of fibroid that tends to cause bowel issues most often is the subserosal fibroid, which grows on the outer surface of the uterus and projects into the pelvic or abdominal cavity. A subserosal fibroid on the back wall of the uterus sits right next to the rectum and sigmoid colon. Even a moderately sized one in that spot can slow stool transit and make you feel like you can never fully empty your bowels. Fibroids on the front wall are more likely to press on the bladder, causing urinary frequency instead. Location matters more than size for everyday symptoms, though very large fibroids can affect everything in the pelvis regardless of where they originate.

Everyday Bowel Symptoms Linked to Fibroids

The most common bowel complaints among people with fibroids are constipation, bloating, and a sensation of rectal fullness or incomplete evacuation. A large cross-sectional survey of women in the United States found that those with uterine fibroids reported severe constipation, bloating, or diarrhea at a higher rate than women without fibroids. Roughly 8 percent of women with fibroids described these symptoms as severe, compared with about 5 percent of women without fibroids. Among fibroid patients who had these gastrointestinal symptoms, about a quarter rated them as extremely bothersome.²

Those numbers might look modest, but they represent the experience of people who may have been living with these symptoms for years without connecting them to fibroids. Constipation from a fibroid pressing on the rectum feels different from ordinary constipation in one important way: it often does not respond well to the usual dietary fixes. You can increase fiber, drink more water, and exercise regularly, and the symptom persists because the root cause is mechanical. The stool has to navigate past a physical obstruction. Bloating from fibroids also tends to be persistent rather than episodic, because the mass is always there.

Less commonly, fibroids can cause a sense of urgency to have a bowel movement, or narrow, ribbon-like stools. These symptoms arise when the fibroid compresses the rectum enough to change its shape. Some people notice that their bowel symptoms fluctuate with their menstrual cycle, becoming worse in the days before or during a period, which likely reflects the temporary increase in blood flow and slight swelling of fibroids during hormonal shifts.

When Fibroids Cause Bowel Obstruction

Full bowel obstruction from fibroids is rare but well-documented. When it happens, it is a medical emergency. Case reports describe both small bowel obstruction and large bowel obstruction from fibroids that have grown large enough to physically block the intestinal tract.

One published case involved a 31-year-old woman who was 13 weeks pregnant and had known subserosal fibroids. She developed signs of small bowel obstruction, confirmed by abdominal X-rays. Conservative management failed, and imaging showed the obstruction worsening. She ultimately required surgical removal of the fibroid, after which she recovered well.³ Another case described a 44-year-old woman with massive fibroids causing mechanical small bowel obstruction, with researchers noting that while large fibroids can cause this kind of blockage, it is not a common scenario.⁴

Large bowel obstruction from fibroids is even rarer. A case report described a 72-year-old postmenopausal woman who came to the hospital with abdominal pain, vomiting, and inability to pass stool or gas. Imaging revealed calcified masses pressing against her ascending colon, causing bowel dilation. During surgery, a large calcified fibroid was found compressing the cecum and causing a partial twist of that part of the bowel.⁵ That case is a reminder that fibroids do not necessarily stop causing problems after menopause. While they often shrink without estrogen stimulation, some calcify and remain large enough to press on the bowel indefinitely.

Extremely Large Fibroids and Abdominal Compression

When a fibroid grows to an exceptional size, it can compress not just the bowel but nearly every organ in the abdomen and pelvis. One reported case involved a fibroid measuring roughly 27 by 22 by 17 centimeters, with an estimated volume of over 5,000 cubic centimeters. The patient, a 44-year-old woman, had developed abdominal compartment syndrome along with kidney failure and bowel compression symptoms. After uterine artery embolization, the fibroid shrank significantly and the compressive symptoms resolved.⁶

Cases like this are outliers, but they illustrate an important point: fibroids can grow to sizes that most people would find hard to believe. A fibroid the size of a watermelon is not an urban legend. When fibroids reach that scale, bowel symptoms are essentially guaranteed because there is simply no room left in the pelvis for the intestines to function normally. The encouraging part of that case is that a minimally invasive procedure was enough to reverse the damage.

Why Fibroid-Related Bowel Symptoms Are Often Misdiagnosed

Constipation, bloating, and abdominal discomfort are among the most generic symptoms in medicine. They overlap with irritable bowel syndrome, inflammatory bowel disease, food intolerances, and a long list of other gastrointestinal conditions. If you go to a gastroenterologist with these complaints and nobody thinks to ask about your gynecological history or order pelvic imaging, fibroids can easily be missed as a contributing factor.

The diagnostic challenge runs in the other direction too. Fibroids and endometriosis frequently coexist, and their symptoms can mimic each other, sometimes requiring invasive procedures like laparoscopy to sort out which condition is causing which symptom.⁷ Endometriosis can itself grow on or near the bowel, producing symptoms that look identical to fibroid-related compression. When both conditions are present, teasing apart the contribution of each becomes genuinely difficult.

A practical takeaway: if you have been diagnosed with fibroids and you also have persistent bowel symptoms that do not respond to standard gastrointestinal treatments, it is worth asking whether the fibroids could be the cause. And if you have chronic bowel symptoms without a clear diagnosis, a pelvic ultrasound to check for fibroids is a reasonable step, especially if you also have heavy periods, pelvic pressure, or urinary frequency.

Treatment Options That Can Relieve Bowel Symptoms

When fibroids are the confirmed source of bowel trouble, treating the fibroids typically resolves or improves the bowel symptoms. The specific approach depends on the severity, the size and number of fibroids, and your reproductive plans.

Myomectomy: Surgical removal of the fibroid while leaving the uterus intact. This is often the first-line surgical option for people who want to preserve fertility. In the case of the pregnant woman with small bowel obstruction, myomectomy resolved the blockage and allowed a full recovery.³
Uterine artery embolization: A radiologist threads a catheter into the arteries feeding the fibroid and injects tiny particles that block blood flow. The fibroid then shrinks over weeks to months. The case of the massive fibroid causing abdominal compartment syndrome showed that embolization can relieve bowel compression even in extreme scenarios.⁶
Hysterectomy: Complete removal of the uterus. This is the only option that guarantees fibroids will not recur. For someone with severe bulk symptoms and no desire for future pregnancy, it can be a definitive solution.
Medication: GnRH agonists and newer oral medications can temporarily shrink fibroids by suppressing hormones that fuel their growth. These are sometimes used before surgery to reduce fibroid size, or as a bridge in situations where surgery needs to be delayed. They generally produce modest improvement in bulk symptoms, but the fibroids tend to regrow once the medication stops.

Over-the-counter remedies like stool softeners and laxatives can offer temporary symptom relief, but they are treating the downstream effect rather than the cause. If a fibroid is physically compressing your rectum, no amount of fiber supplement is going to move it out of the way. These measures can help you manage day-to-day while you figure out a definitive treatment plan, but they are not a long-term answer.

Bowel Problems After Fibroid Surgery

Here is a wrinkle that surprises many people: surgery to remove fibroids can itself cause bowel problems down the line. The culprit is adhesions, which are bands of scar tissue that form between internal organs after surgery. Adhesions after laparoscopic myomectomy are a recognized complication, and they can lead to chronic pelvic pain, impaired fertility, and in some cases small bowel obstruction.⁸

Adhesion-related bowel obstruction can occur months or even years after surgery. The bowel gets kinked or trapped by a band of scar tissue, producing symptoms much like the obstruction the surgery was supposed to prevent. Surgeons use various barrier products and techniques to reduce adhesion formation, but no method eliminates the risk entirely. The risk is generally higher with open surgery than with laparoscopic or robotic approaches, and higher when multiple fibroids are removed from different locations on the uterus.

This does not mean you should avoid surgery. If a fibroid is causing bowel obstruction or significant compression symptoms, the risk of doing nothing is typically greater than the risk of adhesions. But it is worth understanding that the post-surgical landscape includes its own set of bowel-related possibilities, especially if new abdominal symptoms appear months after a myomectomy.

Fibroids and Bowel Issues During Pregnancy

Pregnancy complicates the fibroid-bowel relationship in two ways. First, fibroids often grow during pregnancy because of rising hormone levels, which means a fibroid that was not causing problems before can start pressing on the bowel as it enlarges. Second, the growing uterus itself takes up more pelvic and abdominal space, amplifying any compression that fibroids are already exerting. The case of the 31-year-old woman who developed small bowel obstruction at 13 weeks of gestation illustrates this dynamic. On examination, her abdomen measured 38 weeks in size despite being only 13 weeks pregnant, because the fibroids had enlarged dramatically.³

Pregnant people with known fibroids should be aware that worsening constipation, new abdominal distension, vomiting, or inability to pass gas could signal something more serious than typical pregnancy-related digestive slowdown. Pregnancy on its own commonly causes constipation due to hormonal changes that relax smooth muscle throughout the digestive tract. Adding a growing fibroid to that equation can tip the balance from inconvenient to dangerous. The threshold for seeking evaluation should be lower if you know you have fibroids, especially large or subserosal ones.

Fibroids After Menopause and Ongoing Bowel Effects

A common assumption is that fibroids shrink after menopause and stop causing trouble. For many people this is true, but it is not universal. Some fibroids calcify rather than shrink, turning into hard, stone-like masses that remain exactly where they were. A calcified fibroid has no blood supply to speak of, so it will not respond to hormonal treatments or embolization, and it can continue pressing on the bowel indefinitely.

The case of the 72-year-old woman with large bowel obstruction from calcified fibroids is a good illustration.⁵ She was decades past menopause, yet her fibroids were still capable of causing an acute surgical emergency. Postmenopausal bowel obstruction from fibroids also presents a diagnostic challenge because clinicians may not immediately think of a gynecological cause in an older patient presenting with acute abdominal symptoms. The delay between suspicion and correct diagnosis can be clinically significant.

If you had fibroids before menopause and you develop new or worsening bowel symptoms afterward, mentioning your fibroid history to your doctor is worthwhile even if you assumed the fibroids had resolved on their own. Imaging can clarify whether remnant or calcified fibroids are still in the picture.

Telling Fibroid Bowel Symptoms Apart From Other Conditions

Because the bowel symptoms caused by fibroids are so nonspecific, it helps to know the pattern that suggests fibroids rather than a primary gastrointestinal problem. A few clues point toward fibroids as the source:

Coexisting pelvic symptoms: If your constipation or bloating comes alongside heavy periods, pelvic pressure, urinary frequency, or pain during intercourse, the combination raises suspicion for fibroids more than a gastrointestinal diagnosis alone would.
Positional variation: Some people with posterior fibroids find that their bowel symptoms change with body position or worsen at certain points in their menstrual cycle. Irritable bowel syndrome is sensitive to stress and diet; fibroid-related compression is more likely to vary with hormonal shifts and physical positioning.
Failure of standard GI treatments: If high-fiber diets, probiotics, and medications for constipation or bloating are not making a meaningful dent, the problem may not be in the bowel at all.
A palpable mass: With larger fibroids, you or your doctor may be able to feel a firm, irregular mass in the lower abdomen during a physical exam. A gastroenterologist examining you for bowel complaints may not perform a pelvic exam, which is one reason the fibroid connection gets missed.

None of these clues is definitive on its own. Pelvic ultrasound is the standard first step for confirming fibroids, and MRI can provide more detailed information about the fibroid’s exact relationship to surrounding structures, including the bowel. If bowel obstruction is suspected, CT imaging is typically the fastest way to confirm the diagnosis and assess severity, as it was in several of the reported cases of fibroid-related obstruction.

1
PubMed Central. The impact of fibroid treatments on quality of life and mental health: a systematic review
2
PubMed Central. Patient-reported prevalence and symptomatic burden of uterine fibroids among women in the United States: findings from a cross-sectional survey analysis
3
PubMed Central. Small Bowel Obstruction as a Complication of Uterine Fibroids: A Case Report
4
PubMed Central. Small bowel obstruction secondary to uterine fibroids: a case presentation
5
PubMed Central. Large Bowel Obstruction From a Calcified Uterine Fibroid: A Rare Cause of Extrinsic Compression
6
PubMed Central. What is too big? Uterine artery embolization of a large fibroid causing abdominal compartment syndrome
7
PubMed Central. Endometriosis and Uterine Fibroids (Leiomyomata): Comorbidity, Risks and Implications
8
PubMed Central. Adhesions after Laparoscopic Myomectomy: Incidence, Risk Factors, Complications, and Prevention