To find out the cause of anemia, you need to register for a hematology consultation. Because hematology is a specialized department that treats and diagnoses various diseases of the blood system, among which, anemia is one of the most common diseases in hematology. In clinical practice, there are three common causes of anemia: first, decreased red blood cell production, such as aplastic anemia, myelodysplastic syndrome, leukemia, etc. Second, increased destruction of red blood cells, such as autoimmune hemolytic anemia, and thalassemia, etc. Third, chronic blood loss, such as anemia caused by excessive menstrual flow or chronic bleeding hemorrhoids. No matter which type of anemia is present, it will be diagnosed and treated promptly in the hematology department. Therefore, to identify the cause of anemia, you need to visit the hematology department.