Iron deficiency can cause tiredness and other symptoms, but the only way to know for sure is through blood tests ordered by a health professional. Self- diagnosing or starting iron supplements without testing is not recommended.
Common symptoms
- Feeling very tired, weak, or “wiped out” even after rest.
- Shortness of breath, dizziness, or headaches, especially with activity.
- Pale skin, inner eyelids, or gums, and sometimes cold hands and feet or heart palpitations.
Other possible signs
- Sore or smooth tongue, mouth corner cracks, or brittle/spoon-shaped nails.
- Restless legs, trouble concentrating, poor sleep, or feeling irritable or “run down.”
- Craving non-food items like ice, dirt, or paper (pica) in some people.
How it is diagnosed
- A clinician will usually ask about your symptoms, diet, periods (if relevant), and any bleeding (like heavy periods or stomach/bowel issues).
- Diagnosis is made with blood tests such as a complete blood count (CBC) and iron studies (ferritin, iron, transferrin saturation).
When to seek care
- See a doctor soon if you have persistent tiredness, breathlessness, palpitations, or pale skin for more than a couple of weeks.
- Get urgent medical help if you have chest pain, severe shortness of breath, very fast heartbeat, or signs of heavy or ongoing bleeding.
What you can do now
- Do not start iron pills on your own, as too much iron can be harmful and similar symptoms can come from other conditions.
- Book an appointment with a primary care provider to discuss symptoms and request appropriate blood tests; ask specifically whether testing for anemia and iron levels is appropriate for you.
