Newborns can sleep on their sides, which can relieve the pressure on local tissues from sleeping in one position for a long time and help the normal growth and development of infants. Newborns can sleep on their sides to reduce the chance of milk spillage and vomiting, especially if the side sleeper is located on a 15°-20° slope, vomit can flow out from the corners of the mouth during milk spillage to avoid supine asphyxia. When newborns sleep on their sides, it is recommended to choose the left side position and the right side position alternately. Frequent changes in sleeping position can relieve the physical fatigue of newborns, but prolonged left side lying should be avoided to prevent compression of the heart and affect the pumping function of the baby’s heart. If there is dermatitis, eczema or other skin diseases on the right side of the face, you should try to avoid sleeping in the right side position at this time so as not to compress the local tissues and affect the recovery. In addition, newborns should be burped in the left and right lateral position as much as possible after breastfeeding, and can be converted to supine or prone position after one hour.