Heavy Periods: The Quick Reference
Heavy Periods: the whole thing in five minutes, for when you want the numbers and nothing else.
Menstrual bleeding heavy enough to interfere with physical, social or emotional quality of life.
Key takeaways
- Definition: bleeding that interferes with quality of life
- Common consequence: iron deficiency anaemia
- Most useful single change: Record how often you change protection and any flooding or clots.
- Commonest mistake: Assuming heavy bleeding is normal because it always has been.
- See a doctor if any of the signs under "When to speak to a doctor" below apply to you.
The numbers, in one place
| Measure | Figure |
|---|---|
| Definition | bleeding that interferes with quality of life |
| Common consequence | iron deficiency anaemia |
| Test that shows depleted iron stores | serum ferritin |
| First-line treatment for many | the hormonal coil (LNG-IUS) |
| Non-hormonal options | tranexamic acid and NSAIDs during the period |
In one paragraph
It is defined by impact rather than by volume, it is the commonest cause of iron deficiency in women of reproductive age, and it is treatable.
Worth doing
- Record how often you change protection and any flooding or clots
- Ask for a ferritin test as well as a full blood count
- Ask about both hormonal and non-hormonal treatment options
- Take prescribed iron for the full course, which outlasts symptom relief
Worth avoiding
- Assuming heavy bleeding is normal because it always has been
- Self-supplementing iron without a blood test
- Ignoring bleeding between periods or after sex
Where to go next
- Your Questions About Heavy Periods, Answered
- Heavy Periods: What the Evidence Actually Says
- Heavy Periods — the reference entry
- Menopause: What Published Guidance Supports
- Cervical Screening: What the Evidence Actually Says
When to speak to a doctor
See a GP for bleeding between periods, after sex, or after the menopause, for periods that have suddenly become much heavier, or for heavy bleeding with dizziness or breathlessness. Seek urgent care for bleeding that soaks through protection hourly, or for fainting.
Where this comes from
How this page was put together
Every figure, recommendation and warning above is taken from the guidance named in Where this comes from. Nothing on this page is inferred, summarised or generalised beyond what those bodies publish: where they give a number, it is their number, and where they are silent, so are we. Pages are rebuilt whenever the underlying record changes. Sign-off by a named clinician, where it has happened, is shown at the top of the page along with the date.
Medical disclaimer
This article is general information, not medical advice. It cannot account for your own history, medication or circumstances. Always speak to a GP, pharmacist or another qualified health professional before making changes that affect your treatment, and never delay seeking medical advice because of something you have read here. In an emergency, call 999.
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