Blood loss: A person may experience bleeding from the gastrointestinal (GI) tract when they have colon cancer or take nonsteroidal anti-inflammatory drugs (NSAIDs), such as aspirin.A person usually develops an iron deficiency due to an underlying health condition or factors such as diet and medications. Iron deficiency causes microcytic anemia.
Microcytic anemia is a type of anemia in which red blood cells are smaller than usual. When a person has an MCV level below 80 fl, this suggests they have microcytic anemia.
