Depending on the cause of the disease, patients with anemia may also be referred to other departments such as gastroenterology and gynecology. 1. Diseases for which hematology is recommended Most of the anemia patients can consult the hematology department. Decreased hematopoietic anemia and anemia with excessive destruction of blood cells are preferred to hematology. The former mainly includes aplastic anemia, thalassemia, iron deficiency anemia, etc.; the latter mainly includes autoimmune hemolytic anemia. In addition, idiopathic thrombocytopenic purpura, hemophilia, etc. can also be listed in the hematology department. 2. Diseases of gastroenterology For anemia caused by bleeding from peptic ulcer, anemia caused by rupture and bleeding of esophagogastric varices of cirrhosis, patients may consider registering with the Department of Gastroenterology. 3. Gynecological diseases For excessive menstruation and anemia caused by gynecological diseases such as uterine fibroids and endometriosis, patients may consider registering with a gynecologist.