Female aged 15, says she has iron deficiency. recently feels faint now and again as if she is going to pass out? any ideas, it comes on now an again?

See doc, fix problem: Need to replace iron. Deficiency is common usually menstrual blood loss, at your age less likely gut blood loss; uncommon poor absorption, e.g. Celiac sprue, inadequate intake. Anemia is end stage of iron or other nutritional deficiency.

Anemia: Anemia as that caused by iron deficiency can certainly cause lightheadedness and a feeling of fainting. Heavy periods can be a cause of this as well as poor dietary intake of iron. Have her follow-up with the dr. For eval and lab work to get properly treated. Good luck.