Aplastic anemia is classified as severe or non-severe depending on the severity of the condition. Symptoms of aplastic anemia mainly include anemia, bleeding and infection. 1. Anemia: mainly manifested as pale skin and mucous membrane, shortness of breath, dizziness, tinnitus, memory loss, poor concentration, severe dyspnea, cardiac arrhythmia, and changes in stool pattern and character. 2. Bleeding: non-heavy-type people mainly have skin and mucous membrane bleeding, and rarely see internal bleeding. In addition to skin and mucous membrane bleeding, there are different degrees of internal bleeding, such as hemoptysis, hematochezia, blood in stool, blood in urine, fundus hemorrhage and intracranial hemorrhage, which is often life-threatening. 3. Infection: respiratory tract infection, digestive tract, genitourinary tract and skin and mucous membrane may have different degrees of infection. The aggravation of infection is related to the patient’s own physical condition. If the above symptoms occur, it is recommended to go to the hospital in time, under the guidance of the physician to clarify the diagnosis, and early formal treatment.