Question: what are the four main types of anemia?
Answer: Iron deficiency anemia. This most common type of anemia is caused by a shortage of iron in your body. ... 
Vitamin deficiency anemia. ... 
Anemia of inflammation. ... 
Aplastic anemia. ... 
Anemias associated with bone marrow disease. ... 
Hemolytic anemias. ... 
Sickle cell anemia.