The initial symptoms of iron deficiency anemia in babies are mild, and as the disease progresses, the symptoms become more and more obvious and are divided into iron deficiency primary manifestations, anemia manifestations, and tissue iron deficiency manifestations. There may be dizziness, abdominal pain, mental behavioral abnormalities and other manifestations. 1. Iron deficiency primary manifestations: manifested as black stools, abdominal pain and so on. (1) Black stools, bloody stools: black stools due to peptic ulcer, etc. Some patients also show abdominal discomfort. (2) Abdominal pain: abdominal pain caused by intestinal parasitic infections, or changes in stool characteristics. 2. Anemia manifestations: pallor, weakness, dizziness, palpitations, etc. (1) Pallor: patients will have pale face, lips, nails and other parts of the body. (2) Weakness: patients feel that they have no strength in their body, and the more serious the degree of anemia is, the more obvious the symptoms are. (3) Dizziness: dizziness may occur after activities or when standing suddenly. (4) Palpitations: palpitations occur after engaging in light physical activities. 3. Organizational iron deficiency manifestations: mental behavioral abnormalities, decreased physical strength, growth retardation, oral manifestations, and so on. (1) Mental behavioral abnormalities: irritability, irritability, inattention, xenophagia, etc. (2) Decreased physical strength: easily fatigued, easily infected. (3) Growth retardation: the child’s growth is slower than his/her peers, and his/her intelligence is poorer. (4) Oral manifestations: easy inflammation of the mouth, chapped corners of the mouth. If the above related symptoms occur, it is recommended to bring your baby to the hospital in time for standardized treatment.