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Heavy periods and chronic iron loss: how treatment works | CION Cancer Clinics
Low haemoglobin from heavy periods is treated on two tracks at once. Your doctor replaces the lost iron, usually with tablets and sometimes with an iron drip, and a gynaecologist looks for the reason the bleeding is heavy. Iron alone rarely holds if the monthly loss carries on. This page explains the signs, the usual steps and what your blood report words mean. At CION Cancer Clinics, our haematologist cares for anaemia, bleeding, clotting and inherited blood disorders, with ArogyaSri, CGHS and cashless insurance accepted.
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Medically reviewed by Dr. Basudev PokhrelConsultant Haematologist · last reviewed September 2026, next review due September 2027
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On this page
- How is low haemoglobin from heavy periods treated?
- How do you know your periods are heavy enough to drain your iron?
- What does treatment usually look like, step by step?
- What could be making your periods heavy?
- What do the words on your blood report mean?
- What do families believe about heavy periods, and what is true?
- Common questions about heavy periods and low iron
The short answer
How is low haemoglobin from heavy periods treated?
It is treated on two tracks at the same time. The lost iron is put back, usually with tablets and sometimes with an iron drip. The heavy bleeding is looked at by a gynaecologist, because iron alone cannot keep up with a loss that returns every month.
Why iron on its own often fails
Think of your iron stores as a water tank with a slow leak. Tablets refill the tank. If the leak is left as it is, the level drops again within a few cycles. Many women take iron for years, feel better for a while, and then find the same low result on the next report. That pattern usually means the bleeding was never addressed.
Why the drain builds up slowly
Each heavy period takes away a little more iron than your food puts back. Over months, the stores run down first, and only later does the haemoglobin fall. By the time you feel tired, breathless on the stairs or notice hair thinning, the stores have often been empty for some time.
What this page cannot tell you
It cannot tell you why your periods are heavy, or which treatment suits you. That depends on an examination, a scan and your own blood results, read by a doctor who has seen you.
Never start, stop or change an iron medicine, a hormone or a period medicine on your own. Your treating doctor sets the plan.
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When heavy bleeding cannot wait
If you are soaking through a pad every hour, feel faint or dizzy when you stand, are breathless at rest, have chest pain or a racing heart, go to the nearest emergency department today or call 108. Do not wait for the period to end, and do not rely on iron tablets to fix it. Bleeding after the menopause, between periods or after sex is not an emergency, but it needs a gynaecologist soon rather than later.
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Ask an oncologistIs it heavy?
How do you know your periods are heavy enough to drain your iron?
Many women have lived with heavy periods for so long that they seem normal. These signs suggest the loss is more than usual.
What you change, and how often
You need to change a pad or cup every hour or two, use two pads together, or get up at night to change.
Also a sign
- Bleeding through onto clothes or bedding
- Planning outings around toilets
How long it lasts
Bleeding that goes on for more than a week is one of the signs doctors ask about. So are periods that come close together, giving your body little time to recover between them.
Clots
Passing large clots, bigger than a coin, is common with heavy bleeding. Small clots now and then are usually nothing to worry about.
How you feel
Tiredness that sleep does not fix, headaches, feeling cold, brittle nails, breathlessness on stairs, or a craving to chew ice or raw rice can all point to low iron.
These signs are not a diagnosis. A blood test is.The usual path
What does treatment usually look like, step by step?
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Blood tests to confirm the picture
A complete blood count shows the haemoglobin and the size of your red cells. A ferritin test shows how much iron is stored. A thyroid test is often added, because an underactive thyroid can make periods heavier.
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Iron is started by your doctor
Most women begin with iron tablets. Your doctor chooses the medicine, the amount and how long to take it. Stomach upset and constipation are common, and there are ways to ease them, so tell your doctor rather than quietly stopping.
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A gynaecology review of the bleeding
An examination and usually a pelvic ultrasound look for fibroids, polyps or thickening of the womb lining. Options range from medicines taken during the period to hormonal treatments and, for some women, a procedure.
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A repeat blood test
Your doctor checks whether the haemoglobin is rising. If it is not, the question becomes whether the tablets are being absorbed, whether the bleeding is still too heavy, or whether there is a second cause.
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An iron drip, for some women
If tablets are not tolerated, not working, or the level is very low with more heavy periods ahead, an iron infusion may be suggested. It refills stores faster but does not stop the bleeding.
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Finding the reason
What could be making your periods heavy?
Often no single cause is found, and the bleeding is still treatable. When a cause is found, treating it can reduce the bleeding at its source.
Changes in the womb
Fibroids are non-cancerous lumps of muscle in the womb wall. Polyps are small growths on the lining. Adenomyosis is when the lining grows into the muscle, often with painful periods. An ultrasound usually finds these.
Hormones and other conditions
Periods often become heavier and less regular in your forties, as you approach the menopause. An underactive thyroid, polycystic ovaries, and some blood thinners can also play a part. If you take a blood thinner, tell both your gynaecologist and the doctor who prescribed it, and let them decide together.
A bleeding tendency you were born with
Some women have had heavy periods since their very first one, bleed a lot after dental work or childbirth, and bruise easily. This can point to an inherited bleeding disorder such as von Willebrand disease. A haematologist can test for it, and knowing matters before any surgery.
Who a hormonal option does not suit depends on your age, blood pressure, clot history and plans for pregnancy. Your doctor goes through this with you.On your report
What do the words on your blood report mean?
- Haemoglobin (Hb)
- The protein in red cells that carries oxygen. For adult women who are not pregnant, a level below 12 grams per decilitre is usually counted as low, though reference ranges differ between laboratories.
- Ferritin
- A measure of stored iron. A low ferritin means the stores are running out. Infection or inflammation can push it up and hide a shortage.
- MCV
- The average size of your red cells. Long-term iron loss tends to make them smaller, which a report may call microcytic.
- Transferrin saturation
- How much iron is travelling in the blood right now. A low figure supports iron deficiency when ferritin is unclear.
- Pelvic ultrasound
- A scan of the womb and ovaries, often done through the tummy or internally, to look for fibroids or polyps.
Commonly believed
What do families believe about heavy periods, and what is true?
"Heavy periods are just part of being a woman."
Many women are told this by mothers and aunts who lived with the same thing. Bleeding that drains your iron and limits your day is a medical problem with treatment options. You do not have to put up with it.
"Eating more greens and dates will fix it."
Iron-rich food helps keep stores up once they are full. It rarely refills empty stores while heavy bleeding continues. Food works alongside medical treatment, not in place of it.
"Once the haemoglobin is normal, the iron can stop."
Haemoglobin often recovers before the stores are refilled. Doctors usually continue treatment for a while after that. How long is your doctor's decision, based on your repeat tests.
"A scan of the womb means they suspect cancer."
A pelvic ultrasound is a routine part of checking heavy bleeding. Most findings are fibroids, polyps or nothing at all. It is asked for to find a treatable reason, not because cancer is expected.
Questions we are asked
Common questions about heavy periods and low iron
Can heavy periods really cause low haemoglobin?
Yes. Heavy periods are one of the most common reasons for low iron in women who still menstruate. The loss is small each month but adds up. Stores fall first and the haemoglobin follows. Your doctor may still check for other causes, such as diet or problems absorbing iron, because more than one can be present.
Which doctor should I see, a gynaecologist or a haematologist?
Usually both have a part. A gynaecologist looks for the reason for the bleeding and treats it. A haematologist becomes useful when iron does not work, the counts are very low, an iron drip is being considered, or a bleeding disorder is suspected. Your family doctor can often start the blood tests.
Will I need a blood transfusion?
Most women do not. A transfusion is kept for very low levels with symptoms such as breathlessness at rest or chest pain, or for heavy bleeding that is happening now. For most, iron tablets or an iron drip are enough. The decision is made by the treating team after seeing you and your results.
Is an iron drip better than tablets?
It is faster at refilling stores, not better for everyone. It suits women who cannot tolerate tablets, do not absorb them, or need iron quickly. It needs a clinic visit, costs more, and carries a small risk of reactions. Tablets remain the usual first step when there is time.
Can I get pregnant while being treated?
Tell your doctor if you are planning a pregnancy, because it changes which bleeding treatments are suitable. Some hormonal options are contraceptives. Starting a pregnancy with full iron stores is safer for you and the baby, so many doctors like to correct the iron first.
Do I need a hysterectomy?
Very few women do. Surgery to remove the womb is usually considered only when medicines and smaller procedures have not helped, and when you do not want more children. It is a major decision. Ask about every other option and take time to discuss it with your family.
Can low iron come back after treatment?
Yes, if the heavy bleeding continues. That is the most common reason it returns. A repeat blood test some months after treatment shows whether stores are holding. If they keep falling, the bleeding needs another look, and so do other possible causes of iron loss.
Is heavy bleeding a sign of cancer?
Heavy periods in a younger woman are rarely due to cancer. Bleeding after the menopause, between periods or after sex is different and should always be checked by a gynaecologist. A normal scan does not rule everything out, and a finding is not a diagnosis, so follow the plan your doctor sets.
Your Haematologist
Meet CION's haematologist. One specialist for your blood report and your plan.
Dr. Basudev Pokhrel reviews blood counts, transfusion needs and blood disorders, and works with the CION tumour board on blood cancers.
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Sources
- NHS — Heavy periods
- NICE — Heavy menstrual bleeding: assessment and management (NG88)
- WHO — Fact sheet on low haemoglobin
- NHS — Iron deficiency: symptoms and treatment
- NHLBI — Iron deficiency
This page is general information, not a prescription. Do not change or stop any treatment based on what you read here. If anything is worrying you, contact your own treating team — or call our helpline and we will help you reach the right specialist.
Keep reading
Related pages
Causes of Iron Deficiency in WomenThe other reasons iron runs low besides periodsOral Iron: How to Take It So It Actually WorksGetting the most from your tabletsIV Iron: When Tablets Are Not EnoughWho an iron drip suits and who it does notReading a Ferritin ResultWhat your stored iron figure meansIron DeficiencyThe full iron deficiency guide
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