Hemoglobin 40 means hemoglobin 40g/L, which is a severe anemia and can be seen in anemia caused by various reasons.
1. Anemia caused by decreased erythropoiesis: decreased hemoglobin can be seen in iron deficiency anemia, megaloblastic anemia, aplastic anemia, myelodysplastic syndrome, hematopoietic system neoplastic diseases.
2. Anemia caused by excessive destruction of red blood cells: such as hemolytic anemia, common hereditary spherocytosis, abnormal hemoglobinopathies, hemolytic uremic syndrome, massive burns, malaria and so on.
3. Hemorrhagic anemia: such as acute trauma, idiopathic thrombocytopenic purpura, severe liver disease, hemorrhoids, peptic ulcer, women’s menstrual bleeding caused by excessive menstruation and so on.
Hemoglobin 40g / L may have other causes, should be under the guidance of the doctor to find the causes of anemia, and actively on the cause of the treatment, so as not to delay the condition.