Whether acute renal failure will have severe anemia is related to the severity of the condition, the underlying disease itself and other factors. If the disease is early, mild anemia may occur; however, as the disease worsens, or patients with acute renal failure caused by massive blood loss, severe anemia may occur. Acute renal failure may appear anemia, the disease is mild in the early stage, usually does not appear severe anemia; if the renal function is not recovered for a long time, with the progression of the disease, the degree of anemia is aggravated, and then there may be severe anemia. In addition, some of the underlying diseases that cause acute renal failure can also cause anemia itself, such as hemorrhage, etc., and severe anemia will occur at this time. Patients with acute renal failure are advised to go to regular hospitals in time, improve the examination to clarify the cause of the disease, and then give targeted treatment or therapy under the guidance of doctors.