Is Heavy Period Bleeding Abnormal - Causes of Menorrhagia and When to See a Doctor

How Heavy Is Too Heavy

Normal menstrual blood loss is 30 to 80 mL per cycle. Menorrhagia (abnormally heavy bleeding) is defined as over 80 mL, but measuring is impractical. Practical indicators include: soaking through a pad or tampon every hour for several consecutive hours, needing to change protection during the night, passing blood clots larger than a 10-yen coin, periods lasting over 7 days, or anemia symptoms (fatigue, dizziness, shortness of breath).

Many women normalize heavy bleeding because they have always experienced it or because they lack comparison. If your periods significantly impact daily activities, that alone warrants evaluation regardless of measured volume.

Common Causes

Uterine Fibroids

Benign muscle tumors of the uterus, present in up to 70% of women by age 50. Submucosal fibroids (growing into the uterine cavity) are most likely to cause heavy bleeding. Understanding uterine fibroids helps contextualize heavy bleeding.

Hormonal Imbalance

Anovulatory cycles (cycles without ovulation) produce estrogen without progesterone, causing the endometrium to thicken excessively and shed heavily. Common in perimenopause and PCOS. Understanding hormonal balance and lifestyle is key to management.

Adenomyosis

Endometrial tissue growing into the muscular wall of the uterus. Causes heavy, painful periods and an enlarged uterus. Often coexists with endometriosis.

Endometrial Polyps

Benign growths on the uterine lining that cause irregular or heavy bleeding. Easily removed hysteroscopically.

Bleeding Disorders

Von Willebrand disease and other coagulation disorders affect up to 20% of women with menorrhagia. Often undiagnosed because heavy periods are normalized. Iron deficiency from chronic heavy bleeding is extremely common and compounds fatigue.

When to See a Doctor

Seek evaluation if bleeding soaks through protection hourly, if you pass large clots regularly, if periods last over 7 days, if you develop anemia symptoms, or if heavy bleeding is new or worsening. Evaluation typically includes blood tests (CBC, iron studies, thyroid, coagulation), pelvic ultrasound, and sometimes endometrial biopsy. Period pain relief strategies may also be relevant if heavy bleeding is accompanied by pain.

Treatment Options

Hormonal: combined oral contraceptives, progestin-only methods, hormonal IUD (Mirena - reduces bleeding by 90%). Non-hormonal: tranexamic acid (reduces bleeding by 40-50%), NSAIDs. Surgical: endometrial ablation, myomectomy (fibroid removal), or hysterectomy for severe cases unresponsive to other treatments.

Summary

Heavy periods are not something to simply endure. Multiple effective treatments exist, but they require accurate diagnosis of the underlying cause. If your periods significantly impact your quality of life, seek medical evaluation - you deserve better than monthly disruption.