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There are more than 400 types of anemia. These types of anemia are divided into three main groups, according to their cause. There is anemia caused by blood loss, by decreased or faulty red blood cell production, and by destruction of red blood cells.
Types of Anemia. According to the National Institutes of Health's National Heart, Lung, and Blood Institute, there are more than 400 types of anemia. In general, the causes of these types of anemia can be divided into three groups: â¢ Anemia caused by blood loss. â¢ Anemia caused by decreased or faulty red blood cell production. â¢ Anemia caused by destruction of red blood cells.