Blood cancers: Cancers like leukemia, myeloma, and lymphoma happen when blood cells begin to divide uncontrollably with out dying off at the end of their lifetime cycle. Insufficient red cell mass (anemia) is often the result of bleeding, blood Problems like thalassemia, or nutritional deficiencies, and will need one https://www.youtube.com/watch?v=buIHtQY7fCU