Anemia is a syndrome caused by a decrease in the volume of human peripheral blood red blood cells, which is lower than the lower limit of the normal range and cannot transport enough oxygen to the tissues. The symptoms are mainly manifested in the nervous system, skin and mucous membranes, respiratory system, circulatory system and many other aspects, and the harm is mainly reflected in the above symptoms, if not treated in time, it is more harmful to the patient’s body. 1. Nervous system: The harm of the nervous system is mainly related to The harm to the nervous system is mainly related to cerebral ischemia caused by anemia, and may also be related to blood volume deficiency and blood pressure reduction caused by acute hemorrhagic anemia. The main symptoms are headache, dizziness, depression, syncope, tinnitus, memory loss, inattention, etc. Children with anemia may also experience crying and restlessness, agitation or affect intellectual development, etc. 2. Skin and mucous membranes: Since anemia can lead to insufficient nutrition and reduced blood transport in the skin and mucous membranes, symptoms such as pale or pale skin and mucous membranes, as well as roughness, lack of luster and yellowing may occur, and patients may also 3. Respiratory system: Mild anemia can cause deepening and speeding up of breathing after activity, while severe anemia can lead to symptoms of respiratory system such as shortness of breath in a calm state or even telescopic breathing; 4. Circulatory system: Acute blood loss anemia usually causes symptoms such as rapid heartbeat and palpitations. Mild anemia can cause palpitations and rapid heartbeat after activity, while moderate and severe anemia can cause sudden palpitations at any time, and with the development of the disease, anemic heart disease can occur, causing serious conditions such as cardiac arrhythmia, abnormal heart structure or even cardiac insufficiency and death, which endanger life safety; 5. Other symptoms: including digestive system symptoms such as indigestion, xerophagia, tongue inflammation, as well as enlargement of liver, spleen and lymph nodes, female A variety of clinical symptoms and hazards such as increased menstruation and decreased immunity.