After his retirement, moncler outlet store he still insists on exercising, jogging two laps in the nearby garden every day. However, in the past half month, Zhang ran half of the upper air, the whole body has no strength. In fact, he is only 65 years old, slow down the speed of running can not. Recently, he fainted in the garden. The neighbors took him to the hospital for emergency examination and resuscitation, and the final conclusion was that “anemia” had caused the motion syncope. The anemic fainting of Mr. Zhang shook the elderly in the neighborhood, and they went to the hospital to have their blood checked. As a result, among more than 50 elderly people, three were found to be severely anemic, six were moderately anemic, and almost half were mildly anemic. Among the 3 people with severe anemia, 2 were found to have cancer and the other one had aplastic anemia. So, why are the elderly prone to anemia? The main reasons: (1) Changes in the microenvironment of bone marrow hematopoiesis and its effects As the body ages, the bone marrow adipose tissue gradually increases and the red bone marrow for hematopoiesis decreases. At the same time, insufficient androgen secretion in the elderly leads to a decrease in erythropoietin, which affects the differentiation and maturation of red lineage stem cells. In addition, the oxidative activity and metabolic function of various enzymes in the red blood cells of the elderly are reduced, which contributes to the increase of red blood cell fragility and shortens the life span of red blood cells. (2) Insufficient uptake of hematopoietic substances and absorption disorders The gastrointestinal function of the elderly decreases, the gastric mucosa atrophies, gastric acid secretion decreases, and the absorption of nutrients (including iron, folic acid, vitamin B12, etc.) is poor; the gastrointestinal motility of the elderly decreases, easily leading to constipation, and improper application of drugs can lead to gastrointestinal dysfunction and affect the absorption of nutrients. In addition, due to dietary disorders or unreasonable quantity and quality of food, it will also affect the absorption of nutrients. (3) Lowered immune function in the elderly may cause cellular immune abnormalities, and the normal tissues of the body are destroyed by their own immune active cells and autoantibodies, resulting in autoimmune anemia; as a result of lowered immune function, infectious diseases and tumors are easily caused, resulting in secondary anemia. Finally, we remind all elderly people that when symptoms such as dizziness, weakness, panic and pallor occur, they should go to the hospital promptly to clarify whether anemia exists and the causes of anemia.