Hormonal health

Fibroids and Back Pain: When They're Connected

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Fibroids can cause lower back pain when a large or backward-facing fibroid presses on nerves, muscles, and structures near the lower spine. The ache is usually dull and steady rather than sharp. Because most back pain has other causes, fibroids are typically suspected when heavy bleeding or pelvic pressure accompanies the pain.

Last updated: July 2026

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Can fibroids cause lower back pain?

Fibroids can cause lower back pain, most often when they are large or positioned toward the back of the uterus. A posterior fibroid sits close to the sacrum and the nerves and muscles of the lower back, so its bulk can press on those structures and refer pain outward 1. According to the Office on Women's Health, back pain is among the recognized symptoms fibroids can produce, alongside heavy bleeding and pelvic pressure 1. By age 50, as many as 7 or 8 in 10 women have fibroids, yet only a minority ever notice back pain from them 1.

The discomfort is usually a dull, steady ache or a sense of pressure rather than a sharp, shooting pain. Still, fibroids account for only a small share of lower-back pain overall, since strains, disc problems, and posture are far more common causes. That is why clinicians look for other fibroid clues before blaming the back pain on them.

How do fibroids press on the back?

Fibroids reach the back through their size and position rather than by growing in the spine itself. A fibroid on the posterior uterine wall can push against the rectum and the lower spine, while a very large one raises pressure across the whole pelvis, which the body can register as low-back heaviness 4.

Occasionally a fibroid presses on nerves that travel toward the legs, adding aching or tingling down a thigh. Pain that tracks with the menstrual cycle, worse around periods, can also point to a gynecologic source such as fibroids or endometriosis rather than a purely orthopedic one 4. Location and size, not the mere presence of a fibroid, determine whether the back feels it.

How can you tell if fibroids or something else is causing it?

Telling fibroid-related back pain from other causes rests on the pattern and the company it keeps. Back pain from fibroids usually comes with other fibroid signs — heavy periods, pelvic pressure, or frequent urination — and often eases and flares with the cycle. Purely mechanical back pain, by contrast, tends to shift with movement, bending, or lifting.

A clinician sorts this out with a history, a pelvic exam, and usually an ultrasound, which takes about 15 minutes, to size and locate the fibroids 2. Reassuringly, fibroids are rarely dangerous — fewer than 1 in 1,000 are cancerous, according to gynecologic guidelines 2 — so back pain from a known fibroid is seldom serious. Comparing your experience with chronic pelvic pain causes in women can help you describe the pattern.

When does back pain with fibroids need attention?

Back pain deserves attention when it is severe, changing, or paired with warning signs that point beyond fibroids. New or rapidly worsening pain, pain with leg weakness or numbness, loss of bladder or bowel control, fever, or unexplained weight loss can signal problems that need prompt evaluation regardless of fibroids.

Life stage matters here too: fibroids typically develop during the reproductive years, may enlarge in the 40s during perimenopause as hormones fluctuate, and usually shrink after menopause when estrogen falls, so back pain that begins well after periods stop is less likely to be fibroid-driven 1. If heavy bleeding travels with the pain, when to see a doctor for a heavy period covers what should not wait. Most simple back pain from muscles or discs eases within 4 to 6 weeks, so pain that persists or worsens is worth evaluating whatever the cause.

Common questions

Yes, though it is not the usual cause. Large fibroids or those on the back of the uterus can press on nearby muscles, nerves, and the lower spine, producing a dull ache or pressure. Most back pain comes from muscles, discs, or posture, so fibroids are considered when other fibroid symptoms are present.

It tends to be a dull, steady ache or heaviness in the lower back rather than a sharp, shooting pain, and it often flares around your period. Pain that changes sharply with bending or lifting is more typical of a muscle or disc problem.

If a fibroid is genuinely responsible, reducing its size or pressure can ease the ache, but back pain with another cause will not respond to fibroid treatment. That is why a clinician tries to confirm the source before recommending a plan.

Back pain with leg weakness or numbness, loss of bladder or bowel control, fever, or unexplained weight loss needs prompt evaluation, whatever the cause. Sudden severe pain also warrants being seen rather than waiting.

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Back pain warning signs that need evaluation

  • —Back pain with new leg weakness, numbness, or loss of bladder or bowel control is a reason to seek urgent care right away.
  • —Back pain with fever, chills, or unexplained weight loss is a reason to be evaluated promptly.
  • —Sudden, severe back or pelvic pain is a reason to seek same-day medical care.
  • —Heavy bleeding alongside the back pain that causes dizziness or breathlessness is a reason to have blood work and evaluation.

This article is general health education, not medical advice. Whether fibroids or another condition explains your back pain should be evaluated by a gynecologist or your primary care clinician.

References

  1. 1.Office on Women's Health (U.S. HHS) (2025). Uterine fibroids. Office on Women's Health (womenshealth.gov), U.S. HHS. link ✓Back pain is among the recognized symptoms fibroids can produce, especially with large or posterior fibroids; fibroids develop in reproductive years and often shrink after menopause.
  2. 2.American College of Obstetricians and Gynecologists (2021). Management of Symptomatic Uterine Leiomyomas: ACOG Practice Bulletin, Number 228. Obstetrics & Gynecology. doi:10.1097/AOG.0000000000004401 ✓Evaluation of fibroids with history, pelvic exam, and ultrasound to size and locate them; rarity of leiomyosarcoma among fibroids.
  3. 3.Hartmann KE, Fonnesbeck C, Surawicz T, Krishnaswami S, Andrews JC, Wilson JE, Velez-Edwards D, Kugley S, Sathe NA (2017). Management of Uterine Fibroids (Comparative Effectiveness Review No. 195). Agency for Healthcare Research and Quality (AHRQ). PMID 30789683 ✓Comparative-effectiveness evidence that fibroid treatments can reduce bulk-related symptoms, supporting that treating a responsible fibroid may relieve pressure symptoms.
  4. 4.American College of Obstetricians and Gynecologists (2020). Chronic Pelvic Pain: ACOG Practice Bulletin, Number 218. Obstetrics & Gynecology. doi:10.1097/AOG.0000000000003716 ✓Pelvic pressure and pain, including low-back and cyclic pain, can arise from pelvic masses such as fibroids and are part of the chronic pelvic pain evaluation.

4 sources, numbered by first appearance. General health information, not medical advice. AI-assisted editorial content — every citation independently verified. Editorial policy

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