What causes iron deficiency anemia? i was diagnosed years ago, but am now being told it could be a symptom of something else more severe?

Iron deficiency: Iron deficiency can be caused by lack of iron in the food you eat, bleeding, inability to absorb iron as in celiac disease and pregnancy.

Many causes: The most common cause of iron deficiency anemia in young women is blood loss from menstrual periods. It can also come from blood loss in the digestive system. There can also be problems with insufficient iron in the diet, problems with absorption of iron and with a breakdown of blood cells. Please follow up with your doctor or hematologist to find the cause and treatment.