Reasons for 2-year-old babies to eat hands include psychological factors, oral problems, anemia factors, lack of trace elements and so on. 1. Psychological factors: parents seldom interact with the baby or often reprimand the baby, the baby feels lonely, seek self-soothing, may appear to eat hands. 2. Oral problems: 2-year-old babies are still in a stage of teething, when the gums will have discomfort, may also appear to eat hands. 3. Anemia factor: when the baby suffers from iron deficiency anemia, he or she may suffer from xenophagia and hand eating. 4. Lack of nutrients: Lack of nutrients such as zinc can also lead to hand eating. The baby’s hand eating must be taken seriously and go to the hospital as soon as possible.