Types of Uterine Fibroids: Submucosal, Intramural and Subserosal

• November 10, 2026
• 0

Picture two women in a gynaecologist’s clinic, both hearing the same words: “You have a fibroid.” One has never noticed a thing. The other has spent years planning her life around exhausting periods. Same diagnosis, very different stories.

The difference often comes down to one question: where is the fibroid growing? Let’s walk through the types of uterine fibroids and what each one means for you.

What Are Uterine Fibroids?

Uterine fibroids are non-cancerous growths of muscle and fibrous tissue in or around the uterus, and they are grouped into three main types based on their location: submucosal, intramural and subserosal.

Think of the uterus as a three-layer pear. There is a soft inner lining, a thick muscular middle wall and a thin outer covering. A fibroid can start in any of these layers, and its position often shapes the fibroid symptoms you feel more than its size does. Some women have a single fibroid, while others have several of different types at once. You may also hear them called leiomyomas or myomas, which is the same thing.

What Are the Main Types of Uterine Fibroids?

The three main types of uterine fibroids are submucosal, intramural and subserosal, named after the layer of the uterus in which they grow.

Each type tends to behave differently, depending on whether it presses on the lining, stays within the muscle or pushes outward. Here is a quick snapshot: 

Type	Where it grows	Commonly linked with
Submucosal	Beneath the inner lining, bulging into the cavity	Heavy periods, fertility concerns
Intramural	Within the muscular wall	Often silent; heaviness, longer periods
Subserosal	On the outer surface of the uterus	Pelvic pressure, backache

Size matters too, but knowing where a fibroid sits is often the first step to understanding your symptoms. Together, location and size shape the conversation you’ll have with your doctor. 

What Are Submucosal Fibroids and What Symptoms Do They Cause?

Submucosal fibroids grow just beneath the inner lining of the uterus and bulge into the uterine cavity. They are the least common type but often cause the most noticeable symptoms.

Here’s the interesting part: a small submucosal fibroid can sometimes be more disruptive than a much larger fibroid elsewhere, because it sits right next to the lining that sheds every month. Here is what women commonly notice:

• Heavy menstrual bleeding that may soak through pads quickly
• Periods that last longer than usual
• Bleeding or spotting between periods
• Tiredness or weakness linked to blood loss
• Possible effects on fibroids and pregnancy, since the fibroid changes the shape of the uterine cavity and may affect how an embryo settles in
• In some cases, a pedunculated fibroid, where the growth hangs from a thin stalk

Small in number but big in impact, submucosal fibroids matter most for your periods and for fertility planning.

What Are Intramural Fibroids and Why Are They So Common?

Intramural fibroids grow within the muscular wall of the uterus and are the most common type of fibroid.

If fibroids were a neighbourhood, intramural fibroids would be the ones living in the middle of everything. They develop inside the thick muscle wall and can stretch the uterus as they grow. Many women find they go quietly unnoticed for years. When they do cause trouble, this is what it often looks like:

• Heavy or prolonged periods
• A feeling of pelvic heaviness
• Lower abdominal bloating
• Frequent urge to pass urine
• A uterus that feels bigger than it should, which is why some women notice a slightly rounder lower belly even without weight gain

How much you feel depends on the size, number and exact position of the fibroid.

Very common, often silent, and noticeable mainly when they grow larger, intramural fibroids are the type doctors find most often. 

What Are Subserosal Fibroids and How Do They Feel Different?

Subserosal fibroids grow on the outer surface of the uterus and tend to push outward rather than into the uterine cavity.

Because they grow outward, subserosal fibroids usually have less effect on your menstrual flow. Instead, they can press on neighbouring organs. Depending on where they sit, you might notice:

• Pelvic pressure or a feeling of fullness in the lower abdomen
• Backache
• A frequent urge to pass urine
• Constipation
• In some cases, a pedunculated fibroid that grows on a stalk and can occasionally twist, causing sudden sharp pain that needs prompt medical attention

If your periods seem normal but you have an unexplained fullness in your lower abdomen, this is one of the possibilities a doctor may check for with a scan.

Put simply, subserosal fibroids mostly cause pressure-related symptoms rather than period problems.

How Are the Different Types of Fibroids Diagnosed?

Fibroids are usually diagnosed with a pelvic examination and a pelvic ultrasound, which shows how many fibroids are present, how large they are and which type they are.

The good news is that finding out is usually simple and quick. These are the tests your doctor may use:

• Pelvic ultrasound: often the first step, showing the number, size and location of fibroids
• MRI: suggested in some situations for a clearer map of the uterus
• Saline sonography or hysteroscopy: lets the doctor look closely inside the uterine cavity, particularly when a submucosal fibroid is suspected

Don’t ignore the clues your body gives you, though. Keeping a simple note of your cycle length, flow and pain can help your gynaecologist connect your symptoms with the scan.

A scan together with your symptom history helps your doctor identify the type of fibroid and plan the right next step.

Do All Types of Fibroids Need Treatment?

No. Many fibroids cause no symptoms and only need regular monitoring. Treatment is considered when fibroids cause bothersome symptoms or affect fertility, and the approach depends on the type, size and your life stage.

Hearing the word “fibroid” can feel alarming, but many women simply need periodic check-ups. When fibroid treatment is needed, the options may include medicines to manage bleeding or discomfort, or procedures to remove or treat the fibroid. The route is chosen based on its location. A submucosal fibroid, for example, may be approached differently from a subserosal one. Your age, symptoms and plans for pregnancy also matter. There is no single answer that suits everyone, and each decision is personal and made together with your doctor.

Treatment is not automatic with every fibroid. It is matched to the type, your symptoms and your goals.

When Should You See a Gynaecologist for Fibroids in Gurgaon?

See a gynaecologist if you have very heavy or prolonged periods, pelvic pain or pressure, bleeding between periods, difficulty conceiving or repeated miscarriages.

Sudden severe pelvic pain, or heavy bleeding that soaks through pads quickly, needs urgent medical attention. Otherwise, there is no need to wait until symptoms become unbearable. 

If you’re looking for a gynaecologist in Gurgaon, you can consult Dr. Aruna Kalra, Obstetrician and Gynaecologist at CK Birla Hospital, Gurgaon, or a gynaecologist of your choice. They can review your symptoms and scans and guide you on the next steps. An early opinion brings clarity, and clarity brings calm. 

Final Thoughts

Fibroids are very common, and for many women far less worrying than the word suggests. Submucosal fibroids tend to announce themselves through periods and fertility concerns, intramural fibroids often stay quiet until they grow, and subserosal fibroids speak through pressure. Knowing which of the types of uterine fibroids you may have turns vague worry into useful questions for your doctor. Your body usually drops hints early, so listen to them, track them and talk about them. Understanding your fibroid is the first step toward deciding what, if anything, to do about it.

Medical Disclaimer: This blog is for general awareness and does not replace personalised medical advice, diagnosis or treatment. Please consult a qualified gynaecologist for your specific condition.

Frequently Asked Questions

1. Which type of fibroid is most common?
   Intramural fibroids are the most common of the types of uterine fibroids. They grow within the muscular wall of the uterus and often cause no symptoms until they become larger.
2. Which type of fibroid causes heavy periods?
   Submucosal fibroids are most often linked to heavy menstrual bleeding. They grow just beneath the uterine lining, so even a small one can affect your periods.
3. Can fibroids affect pregnancy?
   Sometimes, fibroids and pregnancy are linked mainly when a fibroid changes the shape of the uterine cavity, as submucosal fibroids can. Many women with fibroids still conceive and have healthy pregnancies.
4. Are uterine fibroids cancerous?
   No. Uterine fibroids are benign (non-cancerous) growths, and cancerous change is very rare. A pelvic ultrasound and regular check-ups help your doctor monitor them.
5. Can you have more than one type of fibroid?
   Yes. It is common to have several fibroids of different types at the same time, such as submucosal and intramural fibroids together.