This document discusses hemoglobin disorders such as thalassemia and sickle cell anemia. Thalassemia is a genetic disorder characterized by deficient or absent synthesis of globin chains, while sickle cell anemia results in rigid, sickle-shaped red blood cells that can clog vessels and reduce oxygen delivery. Normal hemoglobin levels vary by age, sex, and other factors. Though the conditions cannot be cured, management may include increased fluid, a healthy diet, folic acid, and pain medication to reduce symptoms.