The specific severity of chronic anemia depends on the degree of anemia and the primary disease. 1. Chronic anemia is usually caused by various tumors, tuberculosis, chronic kidney disease, malnutrition, etc. The onset and progression of anemia is generally slow, and the patient’s body can tolerate it slowly, and the condition is generally not too serious after active treatment of blood promotion or blood transfusion. 2. However, if the anemia develops into severe and very severe anemia, it will cause ischemia, hypoxia and dysfunction of many organs in the whole body. If the primary disease is malignant tumor, the condition is usually serious. Severe anemia can be life-threatening in a short period of time. Chronic anemia needs early consultation, on the one hand, standardize the treatment of primary diseases, on the other hand, carry out the necessary blood-raising or blood transfusion treatment, pay attention to strengthening nutrition in life, and regularly test the blood routine. Diagnosis and treatment should be carried out under the guidance of physicians.