Determine the newborn lying on the side to sleep well, need to be based on the newborn’s specific situation targeted assessment: 1, the newborn lying on the side to sleep is not good for most healthy newborns, because the body is better, no respiratory infections, lying down to sleep is more comfortable, the body is very symmetrical and uniform force. Sleeping on the side will lead to the occurrence of asphyxia, resulting in the emergence of unnecessary hazards, inappropriate; 2, side lying to sleep is better, if the newborn has acute respiratory infections, such as suffering from acute bronchitis or acute bronchopneumonia, coughing is more pronounced, and respiratory phlegm, sleeping on the side of the side is conducive to the relief of coughing, and effectively prevent phlegm asphyxiation.