The baby occasionally drank once placed long time milk powder generally does not cause serious effects, but still may cause the baby indigestion, acute gastroenteritis and other conditions, abdominal distension, diarrhea, vomiting and so on. 1. indigestion: placed for a long time the milk powder may be deteriorated, the nutritional value will also decline, the baby drink may appear indigestion. The baby will have bloating, diarrhea, vomiting, constipation and other symptoms. 2. Acute gastroenteritis: If the room temperature is too high, the milk powder is spoiled and contaminated by pathogenic bacteria, acute gastroenteritis can also occur. The baby will have bloating, diarrhea, vomiting, constipation and other symptoms. Some babies just occasionally drink a long time placed in the milk powder may not have any adverse effects, pay attention to observe the baby’s situation, if the stool, diet, mental state and so on, no need to worry too much. If the baby occasionally drink a long time placed in the milk powder, if the above abnormal symptoms, it is recommended to go to the hospital in a timely manner, early formal treatment.