Fibroids vs. Endometriosis: How to Tell the Difference

Mistaking one condition for another isn’t just confusing—it can delay the care you truly need. Many women experience symptoms like pelvic pain or heavy periods and assume it’s “normal” or the same issue they’ve heard about before. But when two different conditions share similar signs, getting it wrong can mean living longer with discomfort, frustration, and unanswered questions.

That’s exactly what happens with uterine fibroids and endometriosis. While both can affect your daily life in very real ways, they are not the same condition—and they don’t require the same approach to treatment. Understanding what sets them apart is key to finding real, lasting relief.

The more you know about your body, the more empowered you are to make the right decisions for your health. Let’s break down the differences so you can recognize the signs, ask the right questions, and take the next step with confidence.

What Are Uterine Fibroids?

Uterine fibroids are noncancerous growths that develop in or on the wall of the uterus. They vary widely in size — from as small as a seed to as large as a grapefruit — and can cause heavy menstrual bleeding, pelvic pressure, and discomfort that significantly impacts daily life.

Common Symptoms of Fibroids

• Heavy or prolonged menstrual bleeding
• Pelvic pressure or fullness
• Frequent urination
• Lower back pain
• Pain during intercourse
• Enlarged abdomen (in some cases)

Fibroids grow from the muscle tissue of the uterus and can vary in size—from tiny to large enough to distort the uterus.

What Is Endometriosis?

Each month, the lining of the uterus builds up, breaks down, and exits the body during menstruation. In endometriosis, that same tissue grows outside the uterus — in places it was never meant to be.

It still behaves the same way. It thickens, breaks down, and bleeds — but with nowhere to go, it becomes trapped, triggering inflammation, scar tissue, and adhesions that can cause pelvic organs to stick together.

When the ovaries are involved, fluid-filled cysts called endometriomas can form — adding another layer of pain and complications

Common Symptoms of Endometriosis

• Severe menstrual cramps (often worsening over time)
• Chronic pelvic pain
• Pain during or after intercourse
• Pain with bowel movements or urination
• Infertility or difficulty conceiving
• Fatigue and digestive issues (like bloating or nausea)

Endometriosis is tissue that grows outside the uterus, while fibroids are noncancerous muscular growths that develop within or on the uterine wall itself.

Fibroids vs. Endometriosis — Key Differences

1. Location

Fibroids: Inside or on the uterus

Endometriosis: Outside the uterus (pelvic organs)

2. Type of Pain

Fibroids: Pressure, heaviness, or dull pain

Endometriosis: Sharp, intense, often debilitating pain

3. Menstrual Changes

Fibroids: Heavy bleeding, longer periods

Endometriosis: Severe cramping, pain before and during periods

4. Fertility Impact

Fibroids: May affect fertility depending on size and location

Endometriosis: More commonly linked to infertility

5. Growth Behavior

Fibroids: Solid tumors made of smooth muscle cells

Endometriosis: Misplaced endometrial-like tissue that responds to hormones

Why These Conditions Are Often Confused

Both conditions can cause:

• Pelvic pain
• Painful periods
• Discomfort during sex
• Fertility challenges

Because symptoms overlap, many women go years without a clear diagnosis. This can be frustrating—and emotionally exhausting.

When Should You See a Specialist?

If your symptoms are affecting your daily life, it’s time to seek expert care. Don’t normalize pain that interferes with your routine, work, or relationships.

Warning Signs to Watch For

• Periods that are too heavy to manage normally
• Pain that keeps getting worse over time
• Pelvic discomfort outside of your menstrual cycle
• Difficulty getting pregnant

Early diagnosis can open the door to less invasive, more effective treatments.

How Are Fibroids and Endometriosis Diagnosed?

For Fibroids

• Pelvic exam
• Ultrasound
• MRI

For Endometriosis

• Imaging tests (ultrasound or MRI)
• Laparoscopy (a minimally invasive surgical procedure for confirmation)

Because endometriosis can be harder to detect, it often requires more advanced evaluation.

Treatment Options: Finding Relief That Fits Your Life

The right treatment depends on your symptoms, goals, and overall health.

Endometriosis Treatments

• Hormonal therapies
• Pain management
• Laparoscopic surgery to remove tissue

Fibroid Treatments

• Medications to control symptoms
• Minimally invasive procedures like Uterine Fibroid Embolization (UFE). It lets you keep your uterus. No incisions, no hospital stay, go back to normal activities in one week.
• Surgery such as hysterectomy or myomectomy.  Major procedures performed in the hospital with general anesthesia. 

At South Florida Vascular Associates, minimally invasive options like Uterine Fibroids Embolization (UFE) are designed to help you recover faster and return to your normal life with less disruption.

BOOK AN APPOINTMENT HERE

Frequently Asked Questions (FAQ)

Medical Sources

Mayo Clinic
https://www.mayoclinic.org/diseases-conditions/endometriosis/symptoms-causes/syc-20354656

Johns Hopkins Medicine
https://www.hopkinsmedicine.org/health/conditions-and-diseases/uterine-fibroids