We are open for safe in-person care.
Brain tumor, breast cancer, colon cancer, congenital heart disease, heart arrhythmia. See more conditions.
Mayo Clinic offers appointments in Arizona, Florida and Minnesota and at Mayo Clinic Health System locations.
Subscribe to Housecall
Our general interest e-newsletter keeps you up to date on a wide variety of health topics.
Passing blood clots during menstruation can be normal. The amount, length and frequency of menstrual bleeding vary from month to month and from woman to woman.
However, passing large blood clots may be a sign that something's wrong. If your periods seem heavier than usual — for instance, soaking through one pad or tampon every hour for several hours or passing very large blood clots — check with your doctor.
Your doctor can determine if there's an underlying problem causing your heavy periods. Your doctor may recommend a blood test to check for anemia, a blood condition that can cause you to feel weak or tired. Your doctor may also recommend an ultrasound of your pelvis. Sometimes doctors prescribe hormonal medications to help regulate heavy bleeding.
Sandhya Pruthi, M.D.
Mayo Clinic does not endorse companies or products. Advertising revenue supports our not-for-profit mission.
Check out these best-sellers and special offers on books and newsletters from Mayo Clinic.
Mayo Clinic is a nonprofit organization and proceeds from Web advertising help support our mission. Mayo Clinic does not endorse any of the third party products and services advertised.
A single copy of these materials may be reprinted for noncommercial personal use only. "Mayo," "Mayo Clinic," "MayoClinic.org," "Mayo Clinic Healthy Living," and the triple-shield Mayo Clinic logo are trademarks of Mayo Foundation for Medical Education and Research.