Fibroids 101: What to Know About Symptoms, Diagnosis, and Getting the Care You Deserve – sanoMidLife

This article was created in partnership with sanoLiving clinicians for trusted, accurate information.

medico-de-tiro-medio-explicando-el-modelo-del-sistema-reproductivo.jpg

If you're dealing with fibroids, you're definitely not alone. Up to 80% of women develop these non-cancerous growths during their lifetime. That's a lot of us!

Fibroids can show up in or around your uterus. Sometimes they're tiny. Other times they're much larger. They might cause heavy periods, pelvic pain, or that feeling of constant pressure. Or you might not even know they're there.

The good news? There are lots of ways to manage fibroids today. Understanding what's happening in your body is the first step. When you know the signs and symptoms, you can get the help you need.

Let's walk through everything together. We'll cover what causes fibroids, how to spot them, and all the treatment options available to you. You deserve to feel your best, and there are caring professionals ready to help you get there.

The Science Behind Fibroids: Understanding What Happens in Your Body

What Are Fibroids? The Basics You Need to Know

Fibroids are non-cancerous growths that develop in or around your uterus. They're made of muscle and fibrous tissue and are extremely common.

Quick Facts About Fibroids:

What they are: Benign (not cancerous) tumors made of smooth muscle and connective tissue
Size range: From microscopic to larger than a watermelon
Number: Most women develop multiple fibroids rather than just one
Cancer risk: Less than 1 in 1,000 chance of becoming cancerous
Hormone sensitivity: Often shrink after menopause when hormone levels drop

Types of Fibroids

Type	Location	Characteristics	Common Symptoms
Intramural	Within the uterine wall	Most common type	Enlarged uterus, heavy bleeding
Subserosal	Outer surface of uterus	Can grow very large	Pelvic pressure, urinary/bowel symptoms
Submucosal	Just beneath uterine lining	Less common but most symptomatic	Heavy bleeding, fertility issues
Pedunculated	Attached by a stalk-like growth called a peduncle	Can be subserosal or submucosal	Sudden severe pain if twisted

Common Symptoms to Watch For:

Heavy or prolonged menstrual bleeding (lasting more than 7 days)
Pelvic pressure or pain
Frequent urination, especially at night
Constipation and bloating
Back and leg pain
Pain during intercourse
Fatigue from heavy bleeding (anemia)

Who's at Higher Risk:

Age: Women in their 30s and 40s (reproductive years)
Race: Black women have 2-3 times higher risk
Family history: Having a mother or sister with fibroids
Hormonal factors: Early menstruation, late menopause, never being pregnant
Lifestyle factors: Obesity, high blood pressure

Important to Remember:

Many women have no symptoms at all
Fibroids are very common and treatable
Treatment ranges from watchful waiting to surgery, depending on symptoms
They're hormone-sensitive and often improve after menopause

Now that you understand the basics, let's dive deeper into the fascinating science behind these growths. Scientific data has revealed details about how fibroids develop and why they affect women so differently.

Understanding this science can help you feel more knowledgeable about your condition. It also explains why treatments work for some women but not others. Let's explore what researchers have discovered about these mysterious growths.

The Genetic Mystery

Scientists have made a groundbreaking discovery about fibroids. Most of them start with a tiny change in your DNA called a mutation. This isn't something you inherit from your parents. Instead, it happens spontaneously in certain cells in your uterus.

Key Genetic Findings:

MED12 mutations: Found in 50-80% of all fibroids
Function: MED12 plays a role in gene transcription, cell growth, development, and differentiation
When mutated: MED12 gene mutations can lead to disrupted cell signaling and impair the regulation of cell growth
Location: These mutations are most frequently observed in fibroids, in the myometrial stem cells

Why This Matters:

Explains variation: Different mutations lead to different growth patterns
Predicts behavior: Some fibroids grow slowly, others rapidly
Guides treatment: Understanding mutations helps predict which treatments work best
Prevents recurrence: Future treatments may target these specific genetic changes

The Stem Cell Story: Where Fibroids Really Begin

Your uterus contains stem cells that normally help repair and maintain the muscle tissue. These cells are incredibly powerful. They can divide and create new smooth muscle cells when needed.

How Normal Stem Cells Work:

Repair function: Fix damaged uterine muscle tissue
Controlled growth: Follow strict rules about when and how much to grow
Proper differentiation: Transform into the right type of cells
Limited lifespan: Eventually stop dividing and die naturally

What Happens When Stem Cells Mutate:

Lose growth control: They begin creating abnormal tissue
Ignore stop signals: They continue dividing when they should stop
Become the "seed": They form the starting point for fibroid growth
Recruit helpers: They get support from surrounding normal cells

What's fascinating is that these mutated stem cells can't create fibroids all by themselves. They need help from surrounding normal cells. It's like a corrupted file that needs other programs to run properly. The normal cells unknowingly support the abnormal growth by providing nutrients and growth signals.

Treatment Implications:

Beyond removal: We need to target the stem cells, not just the visible tumor
Preventing recurrence: Eliminating stem cells could prevent fibroids from growing back
New therapies: Treatments are being developed to specifically target these stem cells
Personalized approach: Different stem cell mutations may require different treatments

The Matrix Problem: When Your Body's Scaffolding Goes Wrong

One of the most striking features of fibroids is how different they feel from normal uterine tissue. They're much firmer and denser. This happens because fibroid cells produce excessive amounts of what scientists call extracellular matrix.

Normal vs. Abnormal Matrix:

Normal Uterine Tissue	Fibroid Tissue
Organized, flexible scaffolding	Disorganized, stiff matrix
Balanced production	Excessive production
Allows easy movement	Creates rigid structure
Permits drug penetration	Blocks medication access

Think of extracellular matrix as the scaffolding that holds your cells together. In healthy tissue, this scaffolding is organized and flexible. In fibroids, the cells produce too much scaffolding material. That makes it becomes disorganized and stiff.

Problems Created by Excessive Matrix:

Treatment resistance: Medications have trouble penetrating the dense tissue
Physical symptoms: Rigid structure puts pressure on surrounding organs, potentially causing bladder problems, constipation, and back pain
Microenvironment: Creates conditions that promote continued growth

Why This Matters for Treatment:

Explains symptoms: The pressure symptoms you feel are real and physical
Future solutions: New treatments are being developed to break down this matrix
Predicts outcomes: Matrix density can predict how well treatments will work

Hormones: The Fuel That Feeds the Fire

You probably know that estrogen and progesterone influence fibroid growth. But the science behind this relationship is more complex than simply: "hormones make fibroids grow."

Normal Hormone Response vs. Fibroid Response:

Normal Uterine Cells	Fibroid Cells
Controlled response to hormones	Hypersensitive to same hormone levels
Balanced growth and rest cycles	Continuous growth signals
Proper hormone receptor levels	Altered receptor expression
Normal cell death when appropriate	Resistance to natural cell death

How Hormones Affect Fibroids:

Growth stimulation: Tell fibroid cells to divide and multiply
Matrix production: Instruct cells to produce more scaffolding material
Blood vessel formation: Promote creation of new blood vessels
Cell survival: Help fibroid cells resist normal death signals

This hypersensitivity affects multiple pathways in the cell. Hormones don't just tell fibroid cells to grow. They also instruct them to produce more matrix material, create new blood vessels, and resist normal cell death signals.

The Menopause Connection:

Hormone decline: Estrogen and progesterone levels drop significantly
Fuel shortage: Fibroids lose their primary growth stimulus
Natural shrinkage: Many fibroids can shrink within months to years
Symptom relief: Bleeding and pressure symptoms often improve

The hormone story also explains why fibroids typically shrink after menopause. When estrogen and progesterone levels drop, the "fuel" that drives fibroid growth disappears. The cells slow down their abnormal activities and most will even start to die off naturally (though, unfortunately, not always).

Treatment Options: Science-Based Solutions for Your Fibroids

Now that you understand the science behind fibroids, let's explore how this knowledge translates into treatment options. Each approach targets different aspects of fibroid biology.

Treatment Decision Framework:

Factor	Consideration	Impact on Treatment Choice
Symptoms	Heavy bleeding, pain, pressure	Determines urgency and type of treatment
Fibroid characteristics	Size, location, number	Affects which treatments are possible
Age	Reproductive years vs. perimenopause	Influences long-term treatment strategy
Fertility goals	Want children vs. completed family	Major factor in treatment selection
Overall health	Other medical conditions	May limit certain treatment options

Watchful Waiting

If your fibroids aren't causing symptoms, science supports a wait-and-see approach. Many fibroids grow slowly or not at all. This happens because the genetic mutations that drive them aren't always aggressive.

Scientific rationale:

Many fibroids remain stable for years
Symptoms don't always correlate with size
Approaching menopause often leads to natural shrinkage
Regular monitoring can detect changes early

Your doctor will monitor your fibroids with regular checkups and imaging tests. This approach makes particular sense if you're approaching menopause. The scientific reality is that fibroids typically shrink when estrogen levels drop after menopause.

Medications

Modern fibroid medications work by targeting specific biological pathways. Understanding how they work can help you make informed decisions about treatment.

Hormonal Birth Control works by reducing the hormonal signals that drive fibroid growth. Birth control pills, patches, or rings contain synthetic hormones that can override your body's natural hormone fluctuations. This steadier hormone environment often reduces heavy bleeding and pain.

Progestin-Releasing IUDs (like Mirena) are particularly effective for heavy bleeding. Research found that 85% of women experienced successful treatment.

Scientifically, this works because progestin counteracts some of estrogen's growth-promoting effects on both the uterine lining and fibroid tissue. The localized delivery means lower doses than oral medications.

GnRH Agonists (like Lupron) temporarily shrink fibroids by creating a temporary menopause-like state. These medications tell your pituitary gland to stop producing hormones that stimulate your ovaries. Without estrogen and progesterone, fibroids begin to shrink.

This approach directly targets the hormonal dependency of fibroids. However, it's typically short-term relief because long-term use can cause bone loss. The shrinkage is also temporary, as fibroids usually return to their original size once the medication is stopped.

Tranexamic Acid (Lysteda) reduces heavy menstrual bleeding by helping your blood clot more effectively. This medication doesn't affect fibroid size or growth. Instead, it targets the bleeding mechanism itself.

The science here involves blocking plasmin, an enzyme that breaks down blood clots. When plasmin is inhibited, blood clots remain stable longer, reducing menstrual flow. This is particularly helpful for women whose main symptom is heavy bleeding.

Iron Supplements treat anemia caused by heavy bleeding. While not a fibroid treatment per se, iron replacement is crucial for maintaining your energy and preventing complications from blood loss.

Minimally Invasive Procedures: Precision Targeting

These procedures use advanced technology to destroy or remove fibroids while minimizing damage to surrounding tissue. The science behind each approach is quite different.

Uterine Artery Embolization (UAE) works by blocking the blood supply to fibroids. During this procedure, a radiologist threads a thin catheter through blood vessels to reach the arteries feeding your fibroids. Tiny particles are then injected to block these vessels.

The science is simple. Fibroids need more blood than normal uterine tissue to survive. When you cut off their blood supply, they begin to die while normal tissue remains largely unaffected. Over the following months, fibroids shrink by an average of 60%.

This procedure is particularly effective for subserosal and intramural fibroids. However, it's less suitable for submucosal fibroids or women who want to preserve fertility.

MRI-Guided Focused Ultrasound uses sound waves to heat and destroy fibroid tissue. You lie in an MRI scanner while high-intensity ultrasound beams are focused on your fibroids. The MRI provides real-time images so doctors can target the treatment precisely.

This treatment works best for fibroids that are easily accessible and not too close to sensitive structures. It's completely non-invasive: no incisions, no anesthesia, and you can return to normal activities within a day or two.

Radiofrequency Ablation uses heat generated by radiofrequency energy to destroy fibroid tissue. This can be done through small incisions in your abdomen (laparoscopic approach) or through your cervix (transcervical approach).

The science involves inserting a probe into the fibroid that generates controlled heat. This heat destroys the fibroid cells while sparing surrounding tissue. The body then naturally reabsorbs the destroyed tissue over several months.

This procedure is effective for reducing fibroid size and symptoms. It's particularly good for women who want to preserve their uterus and potentially maintain fertility.

Surgical Options: Definitive Solutions

When medications and minimally invasive procedures aren't sufficient, surgery may be necessary. Understanding the science behind surgical approaches can help you make informed decisions.

Myomectomy removes fibroids while preserving your uterus. This procedure directly addresses the clonal nature of fibroids by removing the abnormal tissue while leaving healthy uterine muscle intact.

There are several approaches:

Hysteroscopic myomectomy removes submucosal fibroids through your cervix using a thin, lighted instrument. This works well for fibroids that grow into the uterine cavity.
Laparoscopic myomectomy removes fibroids through small incisions in your abdomen. This is ideal for subserosal fibroids on the outer surface of the uterus.
Abdominal myomectomy requires a larger incision but allows removal of multiple or very large fibroids.

The science behind myomectomy success lies in complete removal of the fibroid including its "capsule,” which is the boundary between the fibroid and normal tissue. Incomplete removal can lead to regrowth because stem cells may remain.

Hysterectomy removes the entire uterus and is the only definitive cure for fibroids. This procedure eliminates both the fibroids and the uterine tissue that could potentially develop new fibroids.

The science is straightforward: without a uterus, you cannot develop new fibroids. However, this is major surgery with permanent consequences. It's typically recommended only when other treatments have failed or when fibroids are severely impacting your quality of life.

There are different approaches:

Vaginal hysterectomy removes the uterus through the vagina, leaving no visible scars
Laparoscopic hysterectomy uses small incisions and has faster recovery times
Abdominal hysterectomy requires a larger incision but may be necessary for very large fibroids
Hysteroscopic Resection removes submucosal fibroids through your vagina and cervix. A thin, lighted instrument called a hysteroscope is inserted through your cervix. Then fibroid is removed using electrical current or laser energy.

This procedure works well for fibroids that grow into the uterine cavity and cause heavy bleeding. The science involves precise removal of the fibroid while preserving the underlying uterine muscle.

Living with Fibroids: Science-Based Self-Care Strategies

Understanding the science behind fibroids can guide your self-care choices. While medical treatment is important, research shows that lifestyle factors can influence fibroid symptoms and growth.

Tracking Your Symptoms: Becoming Your Own Scientist

Keeping detailed records of your symptoms can help you and your doctor understand patterns and evaluate treatment effectiveness. This scientific approach to self-monitoring can improve your care.

Menstrual Tracking: Record the timing, duration, and heaviness of your periods. Note any changes in flow, clotting, or pain patterns. This information helps your doctor assess whether treatments are working.

Pain Patterns: Track when you experience pain, its location, and its severity. Note what activities or positions make it better or worse. This can help identify triggers and guide treatment decisions.

Other Symptoms: Record bladder symptoms, digestive issues, back pain, or any other problems you think might be related to your fibroids. Sometimes patterns emerge that aren't immediately obvious.

Treatment Response: If you're trying new treatments, document how you respond. This information is valuable for making future treatment decisions.

Hydration and General Health

Staying well-hydrated supports your body's natural healing processes. Proper hydration can help with some fibroid symptoms:

Reduces Bloating: Adequate water intake can help reduce the feeling of abdominal fullness and bloating that some women experience with fibroids.

Supports Circulation: Good hydration helps maintain healthy blood flow, which can reduce pelvic congestion and pain.

Prevents Constipation: Fibroids can press on your bowel, making constipation more likely. Adequate water intake helps prevent this uncomfortable symptom.

Managing Fibroids During Menopause: Is Menopausal Hormone Therapy an Option?

When it comes to using Menopausal Hormone Therapy (MHT) if you have uterine fibroids, it’s not always a simple yes or no—it really depends on your personal health situation. Because fibroids are sensitive to hormones, some types of MHT may cause them to grow or worsen symptoms, while others may not have much effect. That’s why it’s so important to work closely with your healthcare provider to find the right approach for you.

Research shows that MHT can be used by many women with fibroids, but the type of hormones and dosage make a difference. Because hormones can affect how fibroids respond, it’s important to choose the right approach and monitor closely to help prevent fibroid growth.

If you’re considering MHT and have fibroids, talk to your clinician about:

Whether your fibroids are causing symptoms and how large they are
Any history of heavy bleeding, pressure, or pain
The specific type of hormone therapy being suggested (such as estrogen with or without progestin, and how it’s given)
How your provider plans to monitor you over time, such as symptom tracking or imaging

With the right care and follow-up, MHT can still be an option for women with fibroids—it just needs to be personalized and monitored to keep you feeling your best.

Questions to Ask Your Doctor

Understanding the science behind fibroids empowers you to have more productive conversations with your healthcare provider. Here are key questions to help you get the most from your appointments:

"What type of fibroids do I have, and where exactly are they located?"

Understanding whether you have intramural, subserosal, submucosal, or pedunculated fibroids affects treatment options. The location determines symptoms and influences which treatments are most likely to be effective.

"How large are my fibroids, and how many do I have?"

Size and number affect treatment recommendations. Small fibroids might be managed with medication, while large ones may require surgical intervention.

"Are my fibroids likely to grow, and how quickly?"

Growth patterns vary based on factors like your age, hormone levels, and the specific characteristics of your fibroids. This information helps you plan for the future.

Taking Control: Your Fibroid Journey

Advocate for Yourself

Don't be afraid to ask for clarification if you don't understand something. Your healthcare provider should be able to explain treatments and procedures in ways that make sense to you. If they can't, or if you feel rushed or dismissed, consider seeking a second opinion.

Staying Informed

The field of fibroid research is advancing rapidly. Stay informed about new developments, but be cautious about unproven treatments or claims that seem too good to be true. Discuss any new information you find with your healthcare provider.

Supporting Others

Your journey with fibroids can help other women. Consider sharing your experiences (while respecting privacy) and supporting fibroid research and awareness efforts.

The Bottom Line

The science behind fibroids is complex, but the message is hopeful. We're moving toward an era of more effective, personalized treatments based on a deep understanding of how these tumors develop and grow.

Remember that you're not powerless against fibroids. While we can't change the genetic mutations that start them, we can influence many of the factors that affect their growth and symptoms. Maintaining a healthy lifestyle, managing stress, staying informed about treatments, and working closely with your healthcare team all play important roles in managing your condition.

Your fibroid journey is uniquely yours, shaped by your specific genetic makeup, lifestyle, and treatment goals. But you're not alone in facing it. Science is on your side, working to develop better treatments and, ultimately, cures for these common but challenging growths.

The future of fibroid treatment is bright, with new discoveries happening regularly. By understanding the science behind your condition, you're better equipped to navigate your treatment options and advocate for the care you deserve.

You have the knowledge to be an active participant in your healthcare. And that knowledge is power.

References:

https://pmc.ncbi.nlm.nih.gov/articles/PMC5854898/

https://www.mayoclinic.org/diseases-conditions/uterine-fibroids/symptoms-causes/syc-20354288

https://my.clevelandclinic.org/health/diseases/9130-uterine-fibroids

https://www.healthline.com/health/womens-health/are-fibroids-cancerous

https://pmc.ncbi.nlm.nih.gov/articles/PMC6994343/

https://www.healthline.com/health/intramural-fibroid

https://www.usafibroidcenters.com/uterine-fibroids/subserosal-fibroid/

https://www.verywellhealth.com/submucosal-fibroid-5187130

https://www.healthline.com/health/pedunculated-fibroid

https://my.clevelandclinic.org/health/diseases/17734-menorrhagia-heavy-menstrual-bleeding