Anemia occurs in both young people and old people, but anemia in older people is more likely to cause symptoms and be related to serious, underlying conditions. In general, there are three major types of anemia , classified according to the size of the red blood cells: If the red blood cells are smaller than normal, this is called microcytic anemia . Explore the causes and classifications of anemias, from microcytic, normocytic, and macrocytic types . A classification to help you understand the big picture of all anemias! Anemia is the most common blood disorder, and according to the National Heart, Lung, and Blood Institute, it affects more than 3 million Americans. Anemia occurs when there’s a lack of healthy red blood cells or hemoglobin, essential components that help transport oxygen from the lungs to organs and tissues throughout the body. This results in a low supply of oxygen and can lead to feelings of fatigue or weakness. If left untreated, anemia can lead to more serious health issues, including severe tiredness that limits daily activities, complications during pregnancy, or heart problems. Anemia has a variety of causes and may be treated ...
