Heavy period bleeding: what is normal, what is not

Heavy menstrual bleeding (menorrhagia) is more common than most clinicians admit. Soaking through a pad or tampon per hour for several hours in a row, passing clots larger than a quarter, or bleeding longer than 7 days is not "just heavy" - it is medical heavy bleeding, and it is treatable.

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Red flags to act on today

Soaking one or more pads or tampons every hour for several hours. Lightheaded when you stand up. Clots larger than a quarter. Bleeding so much you have to skip work or school. Any of these = call your clinician or go to the ER if you feel faint.

Common causes

Fibroids, polyps, adenomyosis, thyroid imbalance, PCOS, certain birth control methods (especially copper IUD in the first 6 months), bleeding disorders (von Willebrand disease is underdiagnosed in women), perimenopause.

What actually helps

Iron + vitamin C supplementation (heavy bleeders are often iron-deficient even with normal hemoglobin - ask for a ferritin test). NSAIDs (ibuprofen) reduce bleeding by 30 percent when started day 1. Hormonal birth control (especially the hormonal IUD) reduces bleeding by 70-90 percent. Tranexamic acid (Lysteda) reduces bleeding by 30-50 percent during your period.

What does not help

Caffeine cutting (mild benefit at best). Suffering in silence. Being told "this is normal" by a clinician who has not done a pelvic ultrasound.

Common questions

What counts as heavy bleeding? +

Soaking through a pad or super tampon in 1 hour, bleeding more than 7 days, clots larger than a quarter, or anemia symptoms (fatigue, lightheaded, pale).

Could heavy periods be a sign of cancer? +

Rarely, but persistent heavy bleeding (especially after age 40 or after menopause) warrants a workup including an ultrasound and sometimes an endometrial biopsy.

Does heavy bleeding mean low fertility? +

Not directly. But the underlying causes (fibroids, PCOS, thyroid) can affect fertility. Worth investigating if you are trying to conceive.