Baby’s appetite is usually associated with environmental impact, eating habits and other physiological factors, as well as gastrointestinal diseases, lack of trace elements and other pathological factors. 1. Environmental influences: such as hot weather, too cold, will cause the baby appetite, so usually pay attention to adjust the environmental temperature, and appropriate increase in the baby’s physical activity, to enhance appetite is more helpful. 2. Dietary habits: some babies may eat more snacks before the main meal, in the main meal will have no appetite, resulting in decreased appetite. If you eat too much high-carbohydrate and high-fat food, it will affect the amount of food your baby eats in the main meal. 3. Gastrointestinal diseases: usually due to the baby eating cold, unhygienic food, or the abdomen is cold, resulting in acute gastroenteritis, vomiting and diarrhea, loss of appetite performance. 4. lack of micronutrients: iron, zinc and other micronutrient deficiencies can cause babies to have a decreased appetite, partiality, picky eaters and so on. Baby appetite decline may also have other reasons, such as younger babies with sepsis, pneumonia and other conditions, can lead to a decline in appetite, it is recommended to go to the hospital in a timely manner, improve the examination to clarify the cause of the disease, under the guidance of the doctor to give targeted treatment or treatment.