Thalassemia minor generally does not require treatment, and low hemoglobin can be treated with iron supplements such as ferrous sulfate, ferrous fumarate, and iron dextrose, as appropriate. Thalassemia is caused by a defect in one or more of the bead protein genes, resulting in an impairment of the synthesis of bead protein peptide chains. Thalassemia minor generally does not need to be given treatment, and many patients do not show too many uncomfortable symptoms. It is usually found during physical examination or consultation for other diseases, and manifests as microcytic hypochromic anemia. The most common form of microcytic hypochromic anemia is iron-deficiency anemia, in which hemoglobin decreases and iron supplementation can be given. Commonly used iron supplements are ferrous sulfate, iron dextrose, ferrous fumarate, ferrous succinate, and iron polysaccharide complex. Iron is a prescription drug, all need to be used under the guidance of a doctor, avoid self-medication.