The poor appetite of three-month-old babies may be related to milk powder not to the taste of the baby, physical discomfort, indigestion and so on. 1. milk powder is not to the taste of the baby: if the baby is formula fed, when the milk powder does not meet the appetite or the milk powder brewing method is not right, can cause the baby does not want to drink milk powder, showing the phenomenon of poor appetite. 2. Physical discomfort: the baby may have a sick condition, physical discomfort, mental state is not good, so the diet is not much appetite. For example, when there is a fever, the baby will have a reduced appetite. 3. Indigestion: If the baby ate too much at the last meal, causing indigestion. At this time the baby has no hunger, no desire for food, it will cause loss of appetite. Three months baby poor appetite may also have other reasons, 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.