If you have frequent headaches or your skin is pale you might be suffering from iron deficiency. According to studies, iron deficiency is the most common nutritional deficiency in the world. If it is not controlled in time, it can lead to iron-deficiency anemia. According to the National Heart, Lung, and Blood Institute, about 20 percent of women of childbearing age have iron-deficiency anemia. Women in their childbearing years are at higher risk, mainly due to loss of blood during menstruation. It is very important to pay attention to all the symptoms that may warn you that you lack iron in your body. Here are the top 10 signs and symptoms of iron deficiency.