The most common blood diseases include anemia; bleeding disorders such as hemophilia and blood clots; and blood cancers such as lymphoma, myeloma and leukemia, according to the American Society of Hematology. Blood disorders can impact a person's overall health.
Anemia occurs when there is a low red blood cell count, or when the cells fail to function normally. Leukemia is caused by the overproduction of abnormal white blood cells that impair the bone marrow’s ability to produce platelets and red blood cells, states the American Society of Hematology. Lymphoma is brought about by the multiplication of abnormal lymphocytes that eventually damage the immune system. Myeloma cancer cells prevent the production of disease-fighting antibodies that leave the body vulnerable to infections.