Pediatric anorexia is a common problem in pediatrics, referring to the loss or disappearance of appetite, which is one of the common symptoms of digestive disorders in pediatrics, and is extremely common in recent years in the “4-2-1” family model. It is most common in children aged 1-6 years, with a higher incidence in urban children. When children suffer from anorexia nervosa, the loss or disappearance of appetite for a longer period of time will inevitably lead to different degrees of nutritional disorders, affecting growth and development and physical fitness, and making them prone to other diseases. Clinical disease and malnutrition can aggravate the symptoms of anorexia, affecting the physical and mental health of the child, and even life-threatening in serious cases, should be given sufficient attention. 1, etiology It can be caused by a variety of acute and chronic diseases can be caused by both systemic diseases or local diseases of the digestive tract can also be caused by drugs or mental factors and other causes, more commonly caused by poor dietary habits. Various diseases and trace element abnormalities are another cause of anorexia: various gastrointestinal diseases such as peptic ulcer, acute and chronic hepatitis, chronic enteritis, various causes of diarrhea and chronic constipation, tuberculosis, anemia, cold and fever, heart, liver and kidney insufficiency, etc. All kinds of drugs such as erythromycin, azithromycin, etc. can also cause anorexia. It is worth noting that vitamin A and/or vitamin D poisoning can also cause loss of appetite. Lead poisoning (excessive blood lead concentration) in children can also cause loss of appetite. Zinc deficiency is an important cause of anorexia in children because it affects the synthesis of gustatory elements. It can also reduce the function of taste buds and dull the sensation of taste. 2.Treatment The cause should be correctly diagnosed and the primary disease should be treated. Cultivating good eating habits is an important means of treating anorexia at home. Eat regular and quantitative meals without snacking and without favoritism, arrange meals with more vegetable foods and pay attention to nutritional balance, create a comfortable dining environment, and let children participate in physical activities and have regular bowel movements.