Heavy menstrual bleeding is the defining symptom for most women with fibroids. It disrupts work, travel, relationships, and confidence in ways that compound quietly over time. This article explains why it happens, what the medical and natural options are, and what to do practically in the meantime.
The Biology of Heavy Fibroid Bleeding
Several mechanisms drive the blood loss simultaneously:
Enlarged uterine surface area. Submucosal fibroids growing into the cavity and intramural fibroids expanding the wall both increase the total surface area of endometrium — the lining shed each cycle. More surface means more bleeding, directly proportional to the fibroid burden.
Disrupted uterine contractions. The uterus normally contracts during menstruation to compress blood vessels and limit loss. Fibroids interrupt this mechanical process — the uterus cannot contract cleanly around or through fibroid tissue, leaving vessels open longer.
Prostaglandin overproduction. Fibroid tissue is associated with elevated prostaglandins — the inflammatory compounds that cause vasodilation (opening of blood vessels) and inhibit platelet aggregation (the mechanism that stops bleeding). More prostaglandins means more blood loss and more pain alongside it.
Estrogen-driven endometrial thickening. The same hormonal environment that drives fibroid growth also thickens the endometrium. A thicker lining means more tissue to shed and more blood.
The Iron Deficiency You May Not Know You Have
Heavy periods over months or years cause cumulative iron loss. Most women with fibroid-related menorrhagia develop iron deficiency — often before their haemoglobin falls to the level of clinical anaemia. Low ferritin (iron stores) causes fatigue, poor concentration, reduced exercise tolerance, feeling cold, and hair loss — symptoms that are often dismissed as stress or life circumstances rather than investigated as iron deficiency.
Ask your GP for both haemoglobin AND ferritin. If ferritin is below 30 ng/mL, supplementation is warranted regardless of haemoglobin. This is one of the most impactful actions you can take — many women describe the improvement from correcting iron deficiency as dramatic and faster than anything else they tried.
Medical Options for Heavy Bleeding
Levonorgestrel IUD (Mirena): Thins the endometrium, reducing bleeding by 70–90% in most users. First-line recommendation for heavy fibroid bleeding. Does not affect fertility long-term once removed. Works best when fibroids are not severely distorting the cavity.
Tranexamic acid: Non-hormonal. Reduces blood loss per period by approximately 50% by reducing fibrinolysis. Taken only during your period — no ongoing daily medication. A good option for women who want targeted intervention without hormonal treatment.
NSAIDs (ibuprofen, naproxen): Reduce prostaglandins, cutting bleeding by 20–30% and significantly reducing cramping. Must be taken from the very onset of your period, not reactively. Consistent from day one of flow — this timing is the difference between meaningful effect and no effect.
Combined oral contraceptive: Suppresses ovulation and thins the endometrium. Reduces both pain and bleeding. Not suitable for everyone — discuss contraindications with your GP.
Practical Management Right Now
While you work on the longer-term picture: high-absorbency period underwear for the heaviest days. Menstrual discs if you are comfortable with them — they hold more than cups or tampons and are easier to manage on very heavy days. A waterproof bed protector for the first two nights. NSAIDs started on day one of your period rather than when pain becomes unbearable. Iron-rich foods at every meal — lentils, spinach, fortified cereals — always with a vitamin C source for absorption. See our full article on how fibroids affect your period for more detail.
Related reading: 7 Warning Signs Your Fibroids Are Getting Worse (And When To Act) · How To Talk To Your Doctor About Fibroids: Getting The Conversation Right · The Role Of Hormones In Fibroid Development: Estrogen, Progesterone, And Beyond
