7.Cause: Illness
Chronic illness or infection can cause the body to make fewer red blood cells. This can result in a mild drop in hemoglobin. If you have significant blood loss, then you may develop iron-deficiency anemia. And some drugs and medical treatments can also put you at risk for anemia. Consult your doctor to see if you need iron or other supplements.
8.Cause: Blood Loss
Losing too many red blood cells is a common cause of anemia. Heavy menstruation, ulcers, injury, or surgery can cause enough blood loss to lead to iron-deficiency anemia. Women who have heavy menstrual periods should be tested for anemia.