Anemia

Anemia is when the body does not have enough healthy red blood cells. When a person is anemic, it means that the body doesn't have enough hemoglobin in their red blood cells. Hemoglobin is the oxygen-carrying protein that is located inside red blood cells. some of the causes of anemia are:

-certain medication

-genetics

-diseases such as cancer, or rheumatoid arthritis

-kidney failure

-blood loss

-poor diet

-pregnancy

Some of the symptoms of anemia can be chest pains, dizziness,fatigue or lack of energy, headaches, problems concentrating, shortness of breath

resource: http://www.ncbi.nlm.nih.gov/pubmedhealth/PMH0001586/