Hemoglobin C disease is a type of hemoglobinopathy, or hemoglobin disorder. Hemoglobin is a chemical found in the blood and its function is to carry oxygen from the lungs to the rest of the body. Hemoglobinopathies occur when there is a problem with this chemical and it is not able to function correctly. Most people with hemoglobin C typically do not have any symptoms. However, it may cause anemia (low blood cell counts), jaundice (yellowing of the skin), and enlargement of the spleen (an organ in the belly which works to filter blood). This is a genetic disorder, meaning that it may be transferred from parents to their children. This condition often requires lifelong management, including frequent check-ups and often different vitamins, such as folic acid.