Menorrhagia: Heavy and Painful Periods

Clinical Scenario

Susan Francis, 30, presents face-to-face with heavy and painful periods. She has had menorrhagia since menarche at age 12 — 18 years of heavy bleeding requiring super tampons every 2 hours on her heaviest days, with clots, flooding, and severe dysmenorrhoea causing work absence. She also has dyspareunia. She is currently on tranexamic acid and ibuprofen with minimal effect, and ferrous sulfate for iron deficiency anaemia (Hb dropped to 92 g/L three years ago). She is in a long-term relationship and wants children in the next few years.

What This Case Tests

Taking a thorough menstrual history including impact assessment; generating a differential diagnosis (endometriosis, fibroids, adenomyosis, coagulopathy); ordering appropriate investigations (bloods including coagulation screen, transvaginal ultrasound); considering future fertility in the management plan; arranging urgent gynaecology referral for failed medical management.

Common Mistakes Trainees Make

The three most common mistakes are: not considering endometriosis as the primary differential (the triad of dysmenorrhoea, dyspareunia, and menorrhagia since menarche is highly suggestive), continuing to manage in primary care when medical treatment has clearly failed (this patient needs specialist referral), and recommending the Mirena IUS without considering that Susan wants to conceive within the next few years — contraceptive methods must be discussed in the context of her fertility plans.

The Consultation Challenge

Susan has been suffering for 18 years. The severity of her symptoms — super tampons every 2 hours, flooding, severe pain, dyspareunia, and previous anaemia — combined with failed medical treatment means she needs specialist assessment, not another trial of primary care management.

Take a comprehensive menstrual history: cycle length, duration of bleeding, heaviest days, pad/tampon use and frequency, clots (size), flooding episodes, pain (timing, severity, location), impact on work and social life, and the dyspareunia (superficial or deep — deep dyspareunia is suggestive of endometriosis).

The differential diagnosis should include: endometriosis (the leading suspect given dysmenorrhoea from menarche, dyspareunia, and failed treatment), adenomyosis (heavy bleeding with a diffusely enlarged uterus), fibroids (heavy bleeding but typically painless unless submucosal), and coagulopathy (menorrhagia from menarche raises the possibility of an undiagnosed bleeding disorder such as von Willebrand disease — this is often missed).

Investigations today: FBC and ferritin (assess current anaemia status), TFTs, coagulation screen (important given menorrhagia since menarche), and arrange a transvaginal ultrasound. Explain that a normal ultrasound does not exclude endometriosis (which requires laparoscopy for definitive diagnosis) but can identify fibroids and adenomyosis.

Arrange an urgent gynaecology referral. Susan has failed first-line medical management (tranexamic acid and NSAIDs) for years, has dyspareunia suggesting endometriosis, has had significant anaemia, and wants future fertility — all of which justify specialist assessment. If she has private insurance (mentioned in the notes), offer this as an option for faster access.

Be sensitive about fertility. Susan wants children, and a potential endometriosis diagnosis may raise fears about fertility. Endometriosis can affect fertility, but many women with endometriosis conceive naturally or with assistance. Frame the referral positively: "Getting the right diagnosis now actually protects your fertility — the sooner we know what's causing this, the sooner we can manage it properly."

Time check: Spend the first 4 minutes on the menstrual and gynaecological history. By minute 7, explain the differential diagnosis and investigation plan. Use minutes 8-10 for the referral discussion and fertility considerations. Reserve the final 2 minutes for interim management (optimise iron, continue current medication, and safety netting for acute heavy bleeding).

How Examiners Mark This Case

Data Gathering and Diagnosis: Examiners assess the quality of your menstrual history (quantifying blood loss, pain severity, functional impact) and whether you generate an appropriate differential. The triad of dysmenorrhoea, dyspareunia, and menorrhagia from menarche should trigger endometriosis as the leading differential. Examiners also look for whether you order a coagulation screen — menorrhagia from menarche raises the possibility of von Willebrand disease, and this is a commonly missed diagnosis that demonstrates clinical depth.

Clinical Management and Medical Complexity: Examiners expect recognition that medical management has failed and referral is appropriate. They look for appropriate investigations (bloods including coagulation screen, transvaginal ultrasound), knowledge that a normal ultrasound does not exclude endometriosis, and consideration of fertility in the management plan. A trainee who recommends the Mirena or combined pill without acknowledging Susan's desire for future pregnancy will lose marks.

Relating to Others: Examiners assess whether you acknowledge the 18 years of suffering, validate Susan's experience, and communicate the referral as a positive and overdue step. The fertility discussion should be hopeful but honest. Susan should leave feeling that finally something definitive is being done about a problem that has dominated her life.

Example Opening

Strong opening: "Hello Susan, thank you for coming in. I can see from your records that heavy periods have been a problem for a very long time, and the treatment we've tried hasn't been working well enough. I think it's time we got to the bottom of what's causing this. Can you tell me about your periods now — and I'd also like to ask about some other symptoms."

When discussing endometriosis: "Based on what you're telling me — the heavy, painful periods since you were a teenager, and the pain during sex — I think there may be an underlying condition called endometriosis that's driving all of this. The good news is that once we know what we're dealing with, there are effective treatments."

Avoid: "Let's try a different medication first before referring." (Delays necessary specialist assessment for a patient who has already failed first-line treatment).

How This Appears in the SCA

Menorrhagia with failed medical management tests your ability to recognise when primary care management has reached its limit and specialist referral is needed. The endometriosis differential is the clinical curveball — trainees who do not consider it will miss the most likely diagnosis. The fertility dimension adds management complexity.

Key Statistic

Endometriosis affects approximately 1 in 10 women of reproductive age. The average diagnostic delay from symptom onset to diagnosis is 7-8 years in the UK. Early diagnosis and treatment improve quality of life and may help preserve fertility.

Relevant Guidelines

• NICE NG88: Heavy menstrual bleeding — assessment and management
• NICE NG73: Endometriosis — diagnosis and management
• NICE guideline on iron deficiency anaemia.

Frequently Asked Questions

When should menorrhagia be referred to gynaecology rather than managed in primary care?

Refer when: first-line medical treatment has failed (tranexamic acid, NSAIDs, hormonal treatments), there is a suspected underlying cause (endometriosis, fibroids, adenomyosis), the patient has significant anaemia despite treatment, there are red flags (intermenstrual or postcoital bleeding), or fertility considerations complicate the management options. Susan meets multiple referral criteria.

Why should I order a coagulation screen for menorrhagia from menarche?

Menorrhagia from menarche — heavy periods from the very first period — raises the possibility of an inherited bleeding disorder, most commonly von Willebrand disease (affecting approximately 1% of the population). Many women are diagnosed only after years of heavy periods. A coagulation screen (PT, APTT, fibrinogen, and if suspected, von Willebrand factor and ristocetin cofactor) should be requested. Identifying this changes the management entirely and demonstrates clinical thoroughness.

Can endometriosis be diagnosed on ultrasound?

A normal ultrasound does not exclude endometriosis. Superficial peritoneal endometriosis (the most common type) is not visible on ultrasound. Deep infiltrating endometriosis and endometriomas (chocolate cysts) may be identified on skilled transvaginal ultrasound. Definitive diagnosis of endometriosis requires laparoscopy with histological confirmation. Ordering an ultrasound is appropriate to assess for fibroids and adenomyosis, but explaining its limitations demonstrates clinical knowledge.

How do I manage menorrhagia when the patient wants future fertility?

Fertility plans significantly influence management. The Mirena IUS (normally first-line for menorrhagia per NICE) provides contraception, so is inappropriate if the patient wants to conceive soon. The combined pill similarly prevents conception. Tranexamic acid and NSAIDs do not affect fertility and can continue. The priority is specialist assessment and treatment of the underlying cause (e.g., endometriosis surgery) before attempting conception, as untreated endometriosis may impair fertility.

What is the significance of dyspareunia alongside menorrhagia?

Deep dyspareunia (pain with deep penetration) in combination with dysmenorrhoea and menorrhagia is the classic triad of endometriosis. It suggests deep infiltrating disease affecting the uterosacral ligaments or pouch of Douglas. This combination should always prompt endometriosis as the leading differential and warrants gynaecology referral. Asking about dyspareunia is an important data gathering question that many trainees miss due to embarrassment.