👉 Microcythemia is a condition in which the cells of red blood cells are too small, or microcytic. This means that the cells have fewer mitochondria and therefore do not produce enough oxygen to transport it around the body. As a result, the cells will be less able to carry out their energy production function and may eventually die due to lack of oxygen. The condition is characterized by dark skin pigmentation and can occur in various conditions such as hemoglobinopathy, sickle cell disease