Anemia refers to a condition in which there is a deficiency of red cells or of haemoglobin in the blood, resulting in paleness and tiredness. Anemia develops when your blood does not contain enough healthy red blood cells. These cells are important for carrying oxygen around the body.
There are more than 400 types of anemia, which are divided into three groupings: • Anemia caused by blood loss. Anemia caused by decreased or faulty red blood cell production and anemia caused by excessive destruction of red blood cells.