Iron deficiency anemia: definition and meaning
Iron deficiency anemia is a condition in which the body lacks enough iron to make healthy red blood cells, so the blood carries less oxygen. Heavy periods are one of the most common causes in people who menstruate. It can cause tiredness, breathlessness, pale skin and low mood, and it is usually treated with iron.
Why periods and iron are linked
Every period loses some blood, and with it iron. With heavy menstrual bleeding (also called menorrhagia), that loss can outpace what you absorb from food. Iron stores run down first, then hemoglobin falls. Read more about heavy periods.
Symptoms
- Tiredness and low energy that rest doesn't fix
- Shortness of breath, a racing or pounding heartbeat
- Pale skin, headaches, feeling dizzy
- Brittle nails, hair shedding, cravings for ice
- Low mood, irritability and poor concentration
Some of these overlap with PMS and period fatigue, which is why low iron is easy to miss. If you feel exhausted all month, not only before your period, ask for a blood test.
Treatment
A doctor will check your hemoglobin and ferritin (your iron stores). Treatment is usually iron tablets for a few months, plus treating the cause, for example options that make periods lighter. Iron-rich foods help, but they rarely correct anemia alone. Don't start iron supplements without advice, because too much iron is harmful.
See a doctor if you soak through a pad or tampon every hour or two, pass clots larger than a quarter, or feel breathless, faint or exhausted.
Frequently asked questions
How do I know if my period is heavy enough to cause anemia?
Bleeding that lasts more than 7 days, needs changing every 1 to 2 hours, or comes with large clots is a common red flag. A blood test is the only way to know.
Can low iron affect mood?
Yes. Iron deficiency is linked to fatigue, irritability, poor concentration and low mood, which can make PMS feel worse.
Sources
This page is for information only and isn鈥檛 medical advice. If something worries you, please talk to a doctor.
Keep reading
Heavy periods: what counts as heavy and what helpsHow to tell if you have heavy periods: soaking a pad every hour or two, clots, bleeding over 7 days. Causes, treatments that work, and when to get help.
Heavy menstrual bleeding: definition and meaningHeavy menstrual bleeding (menorrhagia) is period bleeding that disrupts daily life. Signs your flow is heavy, common causes, and when to see a doctor.What is menorrhagia?Menorrhagia is the medical term for heavy or prolonged periods, now usually called heavy menstrual bleeding. Signs, causes, and when to see a doctor.Anemia: definition and meaningAnemia means too few healthy red blood cells or too little hemoglobin. Why heavy periods are a common cause, the symptoms to know, and when to get tested.Why is my period so heavy? Common causes and what helpsWhy is my period so heavy? Fibroids, polyps, adenomyosis, hormone changes, an IUD or a bleeding disorder are common causes. What helps and when to get help.