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What causes excessive menstrual bleeding and blood clots?

This Premium Q&A, reviewed and published, features a real conversation between an iCliniq user and a physician.

Patient's Query

Hello doctor,

I have excessive bleeding that lasts weeks and I pass large blood clots very often. I have been experiencing this for about eight years.

Please help.

Thank you.

Hi,

Welcome to icliniq.com.

I have gone through your query and understand your concern.

Excessive bleeding with large blood clots for eight years could be caused by several underlying conditions. Since it has been happening for a long time, it is important to get a proper diagnosis.

Possible causes:

  1. Hormonal imbalance – Conditions like PCOS (polycystic ovarian syndrome), thyroid disorders, or estrogen dominance can cause prolonged heavy bleeding.

  2. Fibroids or polyps – These non-cancerous growths in the uterus can lead to heavy bleeding and clotting.

  3. Adenomyosis – When the uterine lining grows into the muscle, it can cause prolonged bleeding with clots.

  4. Bleeding disorders – Conditions like von Willebrand disease or other clotting disorders can cause excessive bleeding.

  5. Endometriosis – Can cause heavy, painful periods and prolonged bleeding.

  6. Pelvic infections – Chronic infections can cause abnormal bleeding.

What you can do now

See a gynecologist as soon as possible – Since this has been going on for years, you may need tests like:

  1. Pelvic ultrasound (to check for fibroids or polyps).

  2. Hormone blood tests (thyroid, estrogen, progesterone).

  3. Blood clotting tests.

Monitor your symptoms – Track how many pads/tampons you use daily and note any additional symptoms (pain, dizziness, fatigue).

Iron supplements – Since long-term heavy bleeding can cause anemia, taking iron supplements may help prevent weakness and fatigue.

Medications – Doctors may prescribe:

  1. Tranexamic acid (to reduce bleeding).

  2. Hormonal birth control (to regulate periods).

When to seek emergency care?

  1. If you are soaking a pad or tampon every hour for several hours.

  2. If you feel dizzy, weak, or faint.

  3. If you pass extremely large clots (bigger than a golf ball).

This is not normal and needs medical evaluation. Let me know if you need help preparing for a doctor’s visit or if you want advice on managing symptoms in the meantime.

I hope I have answered your question.

Let me know if I can assist you further.

Thank you.

Medically reviewed byiCliniq medical review team

Published At April 7, 2025
Reviewed AtApril 10, 2025

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