Heavy Periods and Low Iron: Why Women Run Low

Heavy menstrual bleeding is one of the most common causes of iron deficiency in Canada, yet many women have lived with it for so long that it feels normal. Month after month, the iron lost in blood outpaces what diet can replace, and the result is a slow slide into exhaustion that often goes unexplained.

Short answer: heavy periods remove more iron than most diets replace, gradually emptying iron stores. Signs of heavy bleeding include soaking a pad or tampon every hour or two, passing large clots, bleeding longer than seven days or needing to change protection overnight. Blood work for ferritin and hemoglobin confirms low iron. Treatment involves both replacing iron and addressing the bleeding itself.

Is your bleeding heavier than normal?

Many people underestimate heavy bleeding because they have nothing to compare it with. Talk to a clinician if you:

• Soak through a pad or tampon every one to two hours for several hours in a row
• Need to double up on protection or change it during the night
• Pass clots larger than a two-dollar coin
• Bleed for more than seven days
• Plan your life around your period or miss work, school or activities because of it
• Have flooding or leaks despite protection

How it leads to low iron

Every millilitre of blood contains iron. Heavy periods can remove considerably more iron each cycle than the body absorbs from a typical diet. Over months and years, iron stores, measured as ferritin, fall. Anemia, a drop in hemoglobin, may come later. Many women have low ferritin and symptoms well before anemia appears. Read low ferritin and iron deficiency.

Symptoms of low iron

• Tiredness that sleep does not fix
• Shortness of breath on stairs, a racing heartbeat
• Hair shedding and brittle nails
• Feeling cold, pale skin
• Headaches and difficulty concentrating
• Restless legs at night (see restless legs and low iron)
• Cravings for ice

Finding the cause of heavy bleeding

Heavy periods are common, but they are not something you simply have to accept. Causes include fibroids, polyps, adenomyosis, endometriosis, hormonal changes around perimenopause, thyroid problems, some medications and bleeding disorders such as von Willebrand disease. Assessment may involve blood work, an ultrasound and, when needed, referral to a gynecologist.

Treatment works on two fronts

1. Reduce the bleeding

Options range from non-hormonal medications taken during periods to hormonal treatments such as a hormonal IUD or the pill, and procedures for specific causes. Your clinician will match options to your plans, including whether you hope to become pregnant. Our Nurse Practitioners can start this conversation and arrange referrals.

2. Replace the iron

Oral iron is usually the first step. If tablets fail, cause side effects or cannot keep up with ongoing losses, an iron infusion may be considered. Compare the two in iron infusion versus iron pills, and read how long after an iron infusion you will feel better.

Whole-person support

Hormones, cycles and energy are closely connected. Our naturopathic doctor, Dr. Parya Bahrampour, ND, focuses on women’s health, including cycle concerns, PCOS, endometriosis and perimenopause, and can support nutrition and iron-rich eating alongside your medical care. Our Nurse Practitioners also offer virtual menopause and HRT care for those in perimenopause. See also iron-rich foods to keep stores up.

When to seek urgent care

Go to an emergency department for very heavy bleeding soaking a pad every hour with dizziness or fainting, bleeding during pregnancy, or chest pain or severe shortness of breath.

Tracking your cycle before an appointment, step by step

Heavy bleeding is easier to assess when you bring clear information.

1. Record start and end dates for at least two or three cycles.
2. Count products. Note how many pads or tampons you use each day, how full they are, and whether you change them overnight.
3. Note clots and flooding. Clots larger than a loonie, or bleeding through clothing or bedding, are worth mentioning.
4. Write down symptoms. Tiredness, breathlessness, dizziness, headaches, hair shedding, cold hands or restless legs can all point to low iron.
5. List medications. Blood thinners, some supplements and hormonal treatments can affect bleeding.
6. Bring past results. Previous ferritin or hemoglobin tests help show trends.

Who needs prompt assessment, and who may manage with a plan

See a clinician soon if you have

• Periods that are suddenly much heavier than usual for you.
• Bleeding between periods, after sex or after menopause.
• Periods lasting longer than seven days on a regular basis.
• Symptoms of low iron that affect daily life.
• A personal or family history of bleeding problems.

When a plan can often be built step by step

If your periods have been heavy for a long time without other warning signs, your clinician can usually start with blood work, discuss options to reduce bleeding, and replace iron at the same time. Referral to a gynaecologist or for an ultrasound may be part of that plan.

Questions to ask about heavy periods and low iron

• Do my results show low iron, anemia or both?
• What could be causing my heavy bleeding, and which tests make sense?
• What options could reduce the bleeding, and what are their trade-offs?
• Should I start with iron tablets, or would an infusion suit me better?
• When will we recheck my ferritin and hemoglobin?

What the research does not cover yet

Heavy menstrual bleeding is one of the most common causes of iron deficiency, yet studies suggest it is often under-reported and under-treated. Researchers are still defining the right ferritin targets for people who menstruate, how often iron should be checked, and how to combine bleeding control and iron replacement effectively over the years.

If an infusion is recommended, read iron infusion side effects to know what to expect. If you are pregnant or planning to be, see iron infusion during pregnancy. Women in Woodbridge, Vaughan and Richmond Hill can bring their cycle notes to a primary care visit and have testing, iron treatment and follow-up coordinated by the same team.

It can also help to remember that heavy periods are common, not something you have to simply put up with. Many people live for years thinking their bleeding is normal because it has always been that way. If your periods regularly disrupt work, school, sleep or exercise, that alone is a good reason to book an assessment and ask about both the bleeding and your iron.

Related care at AuraWell

• Perimenopause symptoms: what is normal and when to get help

Tired of heavy periods draining your energy? Learn about our iron infusion service in Woodbridge or call 905-207-7000 to book an assessment at AuraWell Health, 4600 Hwy 7, Unit 105, Woodbridge, ON L4L 4Y7, serving Vaughan and Richmond Hill.