Anemia: Symptoms, Causes and Treatment
Anemia - A low level of healthy red blood cells or hemoglobin, causing tiredness and breathlessness.
What is Anemia?
Anemia means the blood has too little hemoglobin, the protein in red blood cells that carries oxygen. The most common cause worldwide is iron deficiency, but anemia can also result from low vitamin B12 or folate, blood loss, chronic disease or inherited conditions such as thalassemia. WHO defines anemia in non-pregnant adult women as hemoglobin below 12 g/dL and in adult men below 13 g/dL.
Causes and Risk Factors
- Low iron intake or poor absorption
- Heavy periods or pregnancy
- Bleeding from the gut (ulcers, piles, cancers)
- Low vitamin B12 or folate
- Chronic kidney disease or inflammation
- Thalassemia or sickle cell disease
Signs and Symptoms
- Tiredness and weakness
- Pale skin
- Breathlessness on effort
- Fast heartbeat or palpitations
- Headache, dizziness
- Brittle nails, cravings for ice or clay (pica)
Red Flags: When to See a Doctor Urgently
- Black, tarry stools or vomiting blood
- Chest pain or fainting
- Severe breathlessness at rest
- Unexplained weight loss with anemia
Diagnosis: Tests, Lab and Imaging
A complete blood count (CBC) measures hemoglobin and red cell size. Ferritin, iron studies, B12, folate and sometimes stool tests or endoscopy find the cause.
Treatment and Medicines
Treatment depends on cause. Iron deficiency is treated with oral iron and iron-rich food; severe cases may need intravenous iron or transfusion. B12 or folate are replaced when low. Finding and treating any bleeding source is essential.
Emergency
If you notice any red-flag sign, call 1122 (Pakistan), 911 (USA), 999 (UK) or 112 (Europe), or go to the nearest emergency department. See our emergency first aid guide.
Complications
Heart strain, pregnancy complications and delayed growth in children.
Prevention
- Eat iron-rich foods (meat, lentils, beans, leafy greens)
- Take vitamin C with plant iron sources
- Iron and folic acid in pregnancy as advised
- Treat worm infections where common
Outlook and Follow-up
Most anemia improves within weeks of correct treatment, though iron stores take months to refill.
Patient Education
Write down your questions before appointments, bring a list of all medicines, and ask what results mean for you. Use our symptom checker to learn which departments relate to your symptoms. This Anemia guide is educational and reviewed against WHO, CDC and NIH sources by the ghkh.site editorial team.
Frequently Asked Questions
How long does iron take to work?
Hemoglobin often rises within 2-4 weeks, but treatment usually continues for months.
Should I take tea with iron tablets?
Tea and coffee reduce absorption; take iron at a different time.
Is anemia always due to iron?
No. B12, folate, chronic disease and genetic conditions also cause it.
Sources
We summarise these sources in our own words. Mention of an organisation does not imply endorsement.