Causes, Symptoms and Management of AnemiaAbout This Hardback Anemia is a disease that occurs due to the decreased amount of total red blood cells in the blood. Due to the deficiency of hemoglobin which carries oxygen, the person often experiences shortness of breath on exertion. It can also exhibit symptoms of a heart failure. The most common cause of anemia is blood loss. Several reasons can lead to blood loss such as severe trauma or surgery, menstruation, and gynecological disturbances.