If your 6-month-old baby doesn’t eat milk for the whole day, pay attention to observe the condition of the baby’s mental response, which may be related to common cold, oral inflammation, indigestion and so on. 1. Common cold: Observe whether the baby has fever and other symptoms, may be cold and other causes of common cold, resulting in inappropriate, decreased appetite. 2. Oral inflammation: it may be upper respiratory tract infection, appearing such as mouth ulcers, tonsil inflammation and other reasons, causing oral discomfort, also appear reluctant to eat. 3. indigestion: may be the baby eat too much, resulting in intestinal dyspepsia, dysfunction, caused by delayed food evacuation or flatulence and other reasons so that the baby has no appetite. 6 months of the baby does not eat milk all day, there may be other reasons, it is recommended to go to the hospital in time, improve the examination to clarify the cause, under the guidance of the doctor to give targeted treatment or treatment.