Patients with chronic anemia can cause the following hazards: First, mental abnormalities. Severe with cellular anemia, not only peripheral neuritis can occur, but also mental abnormalities, such as excitement, hesitation, and even sleepwalking, which are all the hazards of anemia. Second, bleeding can occur. Long-term anemia can be combined with thrombocytopenia and other coagulation factor deficiencies, which can lead to cerebral hemorrhage or bleeding in other parts of the body, which is also one of the dangers of anemia. Third, gout. In severe megaloblastic anemia, blood cell destruction in the bone marrow is not effective, resulting in abnormally high serum uric acid values and gout attacks, but this is extremely rare. The danger of this kind of anemia is more serious. Fourth, general performance. Weakness and fatigue are the most common symptoms of anemia. When anemia is severe, some patients may also have low fever. Fifth, cardiovascular system. Panic and shortness of breath after activity are most common. Some patients with severe anemia may also develop angina pectoris, heart failure, lower limb edema, and electrocardiogram changes. In addition, headache, dizziness, dizziness, tinnitus, lack of concentration, insomnia, etc. may occur in the nervous system. These are the possible hazards caused by long-term anemia. Therefore, it is necessary to actively treat it to prevent anemia and improve it.