Anemia: definition and meaning
Anemia is a condition in which you have fewer healthy red blood cells or less hemoglobin than normal, so your blood carries less oxygen around the body. It causes tiredness, weakness, breathlessness and pale skin. In people who menstruate, the most common type is iron deficiency anemia, often caused by heavy periods.
Types of anemia
| Type | Common cause |
|---|---|
| Iron deficiency anemia | blood loss (heavy periods), low iron intake, pregnancy |
| Vitamin B12 or folate deficiency | diet, absorption problems |
| Anemia of chronic disease | long-term inflammation or kidney disease |
| Inherited types | for example sickle cell disease or thalassemia |
Symptoms to notice
- Tiredness that sleep does not fix
- Shortness of breath, a racing or pounding heart
- Pale skin, headaches, dizziness
- Feeling cold, brittle nails, hair shedding
- Craving ice or non-food items (pica)
- Low mood, poor concentration and irritability
Because anemia drains energy and focus, it can make PMS and period days feel much harder. If you always feel wiped out during and after your period, it is worth getting checked.
Periods and anemia
Heavy menstrual bleeding is one of the most common causes of iron deficiency in the world. Signs your periods may be heavy: changing a pad or tampon every 1 to 2 hours, passing clots larger than a quarter, or bleeding longer than 7 days. See heavy periods and what is a heavy period.
See a doctor if you feel constantly tired or breathless, especially with heavy periods. A simple blood test (full blood count and ferritin) can check for anemia. Get urgent help for chest pain or fainting.
Frequently asked questions
Can anemia make your periods heavier?
Severe iron deficiency may itself contribute to heavier bleeding, which can create a cycle worth breaking with treatment.
How long does it take to fix iron deficiency anemia?
Hemoglobin often improves within a few weeks of iron treatment, but refilling iron stores usually takes about three months.
Sources
This page is for information only and isn鈥檛 medical advice. If something worries you, please talk to a doctor.
Keep reading
Iron deficiency anemia: definition and meaningIron deficiency anemia is when low iron means your blood can't carry enough oxygen. Why heavy periods cause it, the symptoms, and what to ask your doctor.
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.
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.Why am I so tired on my period?Why am I so tired on my period? Low hormones, poor sleep, pain, blood loss and low iron. What helps period fatigue, and when tiredness means anemia.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.