Heavy menstrual periods (menorrhagia)

Heavy menstrual periods (menorrhagia) are periods in which bleeding is heavier or lasts longer than normal. You may pass large blood clots and have to change pads or tampons often. Or your periods may last longer than 7 days.

Heavy periods have many possible causes. Most of them aren't serious. But heavy periods can lead to anemia. Treatment can help reduce bleeding and prevent anemia.

Current as of: May 1, 2026

Author: WebMD Ignite Staff

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