Could Fibroids Explain What I’m Experiencing? Symptoms, Heavy Bleeding and Iron Deficiency

Understanding the signs, what else might be happening, and how to prepare for a conversation with your healthcare professional.

Have your periods become heavier? Are you experiencing pelvic discomfort, pressure, persistent tiredness or changes in how often you need to pass urine? Perhaps you have been told you are anaemic, but you are still trying to understand why.

These experiences can leave you with more questions than answers. You may wonder whether fibroids could be involved, whether your symptoms are connected, or what you should ask your GP to investigate.

Fibroids are one possible explanation for some of these symptoms, but they are not the only one. Understanding what you have noticed, how it affects your life and what needs checking can help you take a more informed next step.

At Eira Studios, we believe that understanding your health should help you feel better prepared to participate in decisions about your care—not leave you feeling responsible for diagnosing yourself.

1. What are fibroids?

Fibroids are common, non-cancerous growths that develop in or around the womb (uterus). They vary in size, number and location. Some women have fibroids without experiencing symptoms; others experience heavy periods, pain or pressure that affects everyday life.

According to the NHS, symptoms can include heavy or painful periods, abdominal or lower-back pain, needing to urinate more frequently, bowel difficulties, discomfort during sex and, in some cases, difficulty getting pregnant.

The location, size and number of fibroids can influence symptoms, but symptoms alone cannot confirm that fibroids are present.

Check the evidence: NHS — Fibroids.

2. Recognising possible fibroid symptoms

Heavy or prolonged periods

You may need to change period products more frequently, pass larger blood clots, bleed for longer than usual or experience leaks through clothing or bedding. You might also avoid exercise, social activities or work because you cannot predict how bleeding will affect you.

Fibroids can contribute to heavy menstrual bleeding, but other causes include adenomyosis, endometriosis, bleeding disorders, some medicines and changes associated with the menopause transition. Heavy bleeding that affects daily life is worth discussing with a healthcare professional.

Read the NHS guide to heavy periods.

Pelvic pain, pressure or lower-back discomfort

Some fibroids can cause pain, a feeling of fullness or pressure in the lower abdomen, or lower-back discomfort. However, pelvic pain has many possible explanations, including endometriosis, adenomyosis and other conditions. New, persistent or worsening pain deserves assessment rather than an assumption that fibroids are responsible.

Changes in bladder or bowel habits

Larger fibroids may press on nearby structures and contribute to needing to urinate more often, urgency or constipation. These symptoms can also arise from other conditions, so mention persistent changes to your GP—particularly if they occur alongside pelvic pain, abdominal swelling or changes in menstrual bleeding.

Tiredness, breathlessness or palpitations

These symptoms can sometimes be associated with iron deficiency or iron-deficiency anaemia, which may develop when heavy bleeding causes ongoing iron loss. They are not specific to fibroids or anaemia, however, and should not be attributed to either without appropriate assessment.

The key point: symptoms are clues, not a diagnosis. Several conditions can produce similar experiences, and more than one condition may be present at the same time.

3. Heavy bleeding, iron deficiency and anaemia: what is the difference?

Iron deficiency means that your body’s iron stores are too low. Iron is needed to make haemoglobin, the protein in red blood cells that carries oxygen around the body.

Iron-deficiency anaemia develops when iron deficiency has reduced haemoglobin below the appropriate laboratory reference range. Iron stores can become depleted before anaemia develops, so a normal haemoglobin result does not always mean iron stores are adequate.

Possible symptoms of iron-deficiency anaemia include persistent tiredness, shortness of breath, noticeable heartbeats, headaches and paler skin than usual. Symptoms vary, and some people have few noticeable symptoms.

Heavy periods are a common cause of iron-deficiency anaemia. If fibroids contribute to heavy bleeding, they may be part of the chain of events—but the cause of iron deficiency still needs to be considered. Other causes include dietary factors, problems absorbing iron and blood loss from elsewhere in the body. Unexplained iron-deficiency anaemia should not automatically be attributed to menstruation.

Check the evidence: NHS — Iron-deficiency anaemia and the British Society of Gastroenterology guideline on iron-deficiency anaemia in adults.

4. What tests might be discussed?

Your assessment will depend on your symptoms, medical history and examination findings. You may not need every possible test.

A full blood count

NICE recommends a full blood count for women with heavy menstrual bleeding. This blood test measures different blood cells, including haemoglobin, and can help identify anaemia. It does not, by itself, establish every cause of anaemia or reliably rule out early iron deficiency.

Iron studies, including ferritin when appropriate

Ferritin is a blood marker used to assess the body’s iron stores. A clinician may consider ferritin or other iron studies when iron deficiency is suspected or other results need further investigation. NICE advises against routinely testing ferritin in every person with heavy menstrual bleeding; that does not mean ferritin is never useful. The decision depends on the clinical picture.

An ultrasound scan and other investigations

If fibroids are suspected, an ultrasound scan can help identify whether they are present and show their size, number and location. Depending on your symptoms, a clinician may discuss an examination, hysteroscopy or other tests. For example, persistent bleeding between periods may need a different investigation from heavy periods alone.

It is reasonable to ask why a test is being recommended, what it may show and what the next step would be if the result is normal.

Check the evidence: NICE guideline NG88 — Heavy menstrual bleeding: assessment and management.

5. Preparing for your appointment

You do not need to arrive with a diagnosis. It can help to arrive with a clear account of what you have been experiencing. Consider noting:

How long your periods last and whether your bleeding pattern has changed.
How frequently you change period products and whether you experience flooding or pass large clots.
Any pain, pelvic pressure, bladder or bowel changes.
Tiredness, breathlessness, palpitations or other symptoms affecting daily life.
Previous diagnoses, blood-test results, medicines or treatments.
How your symptoms affect work, sleep, relationships, exercise and other activities.

If possible, keep a simple symptom diary. A few specific examples can help you explain what is happening.

Questions you could ask your GP

Could fibroids be one possible explanation for my symptoms? What else should we consider?
Should I have a full blood count, and is there a reason to check my iron stores?
Based on my symptoms and examination, would an ultrasound or another investigation be appropriate?
If a test is normal but my symptoms continue, what should happen next?
What treatment or support is available to reduce the impact of my symptoms while we investigate the cause?

You can also explain what matters most to you—for example, controlling bleeding, reducing pain, preserving fertility or understanding persistent fatigue. NICE recommends taking the impact of heavy menstrual bleeding on quality of life into account when discussing care.

6. When should you seek medical advice?

Arrange an appointment with your GP if heavy periods are affecting your life, your bleeding pattern changes, you have persistent pelvic pain or pressure, or you are concerned about possible iron deficiency.

Seek urgent NHS advice if you have severe or worsening pelvic pain that is not helped by painkillers. If you experience severe breathlessness, chest pain, collapse or feel seriously unwell, seek emergency help.

If you have gone through menopause and experience any vaginal bleeding—even a small amount or a single episode—it needs to be checked by a GP.

Further guidance: NHS pages on period problems, period pain and postmenopausal bleeding.

7. The bigger picture: your symptoms deserve attention

Fibroids can be part of a wider picture involving menstrual health, iron levels, pain, fertility concerns and quality of life. But recognising a possible connection is only the beginning.

The aim is not to fit every symptom into one explanation. It is to understand what may be connected, identify what needs checking and work with a healthcare professional to decide what happens next.

If you feel that your concerns have not been fully addressed, you can ask for an explanation of the findings, what they do and do not rule out, and what follow-up is appropriate if symptoms persist. You deserve clear information, the opportunity to ask questions and to be involved in decisions about your care.

Your Eira next step

Choose one symptom that has been concerning you. Write down when it happens, how often it occurs and how it affects your life. Then choose one question from this article to take to your next appointment.

You do not have to work everything out before asking for help.

Understand your health. Navigate with confidence.

Sources and evidence notes

NHS — Fibroids: symptoms, diagnosis and treatment.
NICE guideline NG88 — Heavy menstrual bleeding: assessment, blood tests, investigations and care.
NHS — Heavy periods: possible signs, causes and treatment options.
NHS — Iron-deficiency anaemia: symptoms, causes, blood tests and treatment.
British Society of Gastroenterology — Guidelines for the management of iron-deficiency anaemia in adults.
NHS — Postmenopausal bleeding: why bleeding after menopause requires assessment.

Eira Studios provides general health education, not individual diagnosis or treatment advice. This article is not a substitute for an assessment by a qualified healthcare professional.