Thalassemia positive, some severe and some not, because thalassemia is an inherited disease. Due to the genetic defect, which leads to impaired synthesis of the red blood cell bead protein peptide chain, some patients develop symptoms of hemolytic anemia. Also according to the protein peptide chain synthesis disorder contained, thalassemia is divided into four types: thalassemia carriers, mild thalassemia, moderate thalassemia and severe thalassemia. Generally, in simple thalassemia gene carriers, the patient does not develop the disease and has no obvious clinical symptoms and no serious consequences. Patients with mild thalassemia often have only mild anemia, or no anemia symptoms, and their normal growth and development are not significantly affected. Therefore, these two types of thalassemia are not serious, but in moderate thalassemia and severe thalassemia, the patient will have obvious anemia symptoms, jaundice, enlarged liver and spleen, and some other symptoms, and the consequences are very serious. Therefore, whether a positive thalassemia is serious or not depends on the type of thalassemia.