Infants are very sleepy to pay attention to the following situations: First, insufficient intake, when the intake of milk or food is insufficient blood sugar is low, poor mental state. Second, severe respiratory infections, such as severe pneumonia combined with heart failure. Third, digestive system diseases, when there is obvious vomiting or a large amount of diarrhea, stools in ten times a day, accompanied by signs of dehydration, such as crying tears, dry lips, urine decreased, the baby’s mental state is poor, sleepy. Fourth, central nervous system disease, when there is encephalitis, craniocerebral tumor or intracranial hemorrhage and other diseases, there will be sleepy state. Fifth, hypotonia, the baby does not love to move, involuntary movement is reduced, and more sleepy. No matter which cause of the disease may lead to the baby’s poor mental state, it is necessary to go to the hospital in time, so as not to delay the condition.