Thalassemia is a genetic blood disorder characterized by the reduced production of hemoglobin, the protein in red blood cells that carries oxygen. This condition leads to anemia, fatigue, and various complications due to the inadequate oxygen supply to the body's tissues. There are two main types: alpha thalassemia and beta thalassemia, each affecting different chains of hemoglobin. Treatment often involves regular blood transfusions, iron chelation therapy, and in some cases, bone marrow or stem cell transplants.