If the infant sleep does not wake up, because the baby is too small, the biological clock has not been formed, resulting in the baby’s daily to sleep, only hungry wake up to eat milk and urine and feces after discomfort will wake up. After eating enough will sleep 1-3 hours until hungry again, if sleep more than three hours to wake up to pay attention to see if the child has a fever and other phenomena, if the mental state is not good, we must take the baby to the hospital for treatment. Older children sleep not wake up is a normal phenomenon, if the child plays more crazy during the day, coupled with less sleep during the day, the night will sleep more deeply, and deep sleep is conducive to the development of the child’s brain and growth. As long as the daytime mental state is good, eat and drink normally, parents do not have to worry too much.