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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.
Some diseases of the red blood cells are inherited. Diseases of the red blood cells include many types of anemia, a condition in which your body can't produce enough normal red blood cells to carry sufficient oxygen throughout the body.People with anemia may have red blood cells that have an unusual shape or that look normal, larger than normal, or smaller than normal.Symptoms of anemia include tiredness, irregular heartbeats, pale skin, feeling cold, and, in severe cases, heart failure.eople with anemia may have red blood cells that have an unusual shape or that look normal, larger than normal, or smaller than normal. Symptoms of anemia include tiredness, irregular heartbeats, pale skin, feeling cold, and, in severe cases, heart failure.