Anemia is a syndrome in which the body’s peripheral blood erythrocyte volume is reduced below the lower limit of the normal range and cannot transport enough oxygen to the tissues to produce. As the red blood cell volume is more complicated to determine, the hemoglobin (Hb) concentration is often used clinically instead. The range of mild anemia is defined as anemia with hemoglobin >90g/L. Our hematologists believe that in China’s sea level region, adult male hemoglobin <120g/L, adult female (non-pregnant) hemoglobin <110g/L, pregnant women hemoglobin <100g/L are considered anemic. but the specific value is affected by age, gender and altitude of long-term residence, infants, children and pregnant women have lower hemoglobin concentrations than adults, and residents of long-term highland areas have higher normal values of hemoglobin than sea-level residents The normal values of hemoglobin are higher in residents of highland areas than in sea-level residents. Based on different clinical characteristics, there are different classifications of anemia, which can be divided into mild, moderate, severe and very severe anemia according to the level of hemoglobin concentration. Mild anemia ranges from anemia with hemoglobin ≥90 g/L, moderate anemia is hemoglobin in the range of 60-90 g/L, severe anemia is hemoglobin in the range of 30-59 g/L, and very severe anemia is hemoglobin <30 g/L. Patients with mild anemia often have no obvious clinical symptoms, but may have pale skin and mucous membranes, shortness of breath, wheezing, and weakness after activity, which may also lead to dizziness, headache, insomnia, tinnitus, and even blurred vision, memory loss, and poor concentration, etc. In severe cases, palpitations, panic attacks, and chest tightness may occur. Mild anemia is generally recommended to be adjusted by diet, you can take gum and blood oral solution and iron supplements appropriately, and regular blood test, it is recommended to eat more red dates, cinnamon, pig blood, spinach, pig liver and other iron-rich foods, in addition try not to stay up late to avoid damage to the body.