Iron deficiency anemia occurs when the body’s iron stores are insufficient to maintain normal hemoglobin and red blood cell production. Below you’ll find general information about likely causes, common signs, typical diagnostic tests, and which medical specialties may help with evaluation. If you notice sudden severe symptoms such as intense chest pain, fainting, or sudden severe shortness of breath, seek emergency care immediately.
Iron deficiency anemia develops when iron intake, absorption or losses are not balanced with the body’s needs. Common causes include chronic blood loss (for example gastrointestinal bleeding or heavy menstrual bleeding), insufficient dietary iron, increased iron requirements (pregnancy, growth periods), and disorders that reduce iron absorption. Past surgeries or some chronic illnesses can also contribute.
Typical symptoms include persistent fatigue, pale skin or mucous membranes, shortness of breath on exertion, palpitations, lightheadedness and brittle nails. Some people report changes in appetite or sore corners of the mouth. If you experience severe chest pain, collapse, sudden severe breathlessness, confusion or loss of consciousness, call emergency services without delay.
Initial assessment usually starts with blood tests: a complete blood count (hemoglobin, hematocrit, MCV), ferritin, serum iron and total iron‑binding capacity (TIBC). Peripheral blood smear and reticulocyte count may be used. If a bleeding source is suspected, further tests such as gastrointestinal evaluation or specialist imaging may be needed. Your clinician will combine symptoms and lab results to guide further workup.
Primary care doctors (family physicians or internists) commonly perform the first evaluation. Depending on findings, referral to Hematology, Gastroenterology or Obstetrics–Gynecology may be recommended. Dietary measures—eating iron‑rich foods and pairing them with vitamin C sources to improve absorption—can support iron status, but assessment and treatment decisions should be made by a clinician. Identifying and addressing any source of blood loss is important for long‑term management.
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