The main clinical manifestations of pediatric anorexia, also known as pediatric anorexia nervosa, are poor appetite, poor appetite, and a significant decrease in eating. It is common in pediatric internal medicine clinics, and is mainly treated through dietary modification, improvement of dietary habits, physical activity, and reasonable supplementation of trace elements. For infants, especially those under half a year old, it is important to strive for exclusive breastfeeding and remember to add complementary foods arbitrarily before four months of age. In addition, for older infants, including small toddlers, who add complementary foods, deliberately cultivate regular eating habits, eat regularly, eat less and more often, and avoid greasy, high-fat, high-calorie foods, especially fried foods and other junk foods. Intentionally carry out appropriate physical exercise and induce sports hobbies. This move can effectively increase the peristalsis of smooth muscles of the gastrointestinal tract of the affected children, resulting in a strong secretion of digestive juices and increased appetite. For children with zinc and iron deficiency, appropriate zinc and iron supplementation can improve the appetite of children and promote the improvement of gastrointestinal function, which is conducive to the treatment of anorexia in children. In addition, if the above treatment does not improve or even worsen, pay attention to the examination to exclude the primary disease. For example, if systemic diseases or gastrointestinal diseases are detected in time, the child’s appetite will be significantly improved after the primary diseases are treated in time. In short, anorexia in children is a matter of prevention, once the symptoms of anorexia appear, we should take appropriate measures in a timely manner to avoid further aggravation of the disease, such as still no improvement in time to go to the hospital for treatment.