Why is my period so heavy?
Last updated September 3, 2026.
Soaking through hourly, large clots, or 7+ days is heavy bleeding - the top cause of iron-deficiency anemia in women. Fibroids, hormone imbalance, thyroid, and bleeding disorders are the causes; treatment works.
What to do
- Measure it objectively - hourly soaking or large clots is the threshold, per womenshealth.gov.
- Track pad counts for a cycle - numbers beat descriptions at the doctor.
- Get bloodwork and an exam - anemia, thyroid, ultrasound.
- Note lifelong heaviness plus bruising - the bleeding-disorder clue worth naming.
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