Infants spit in their sleep for the following reasons: 1, may be pediatric gastroesophageal reflux, there are digestive secretions, through the pharynx back up when the child will have the phenomenon of spitting, this situation parents must pay attention to, try to give the child before bedtime to the treatment of burping, after feeding the milk should also be burped, can avoid the child to often occur gastroesophageal reflux, for the formation of digestive tract stimulation. 2, infants with respiratory diseases, such as coughing, coughing up phlegm, pneumonia conditions, the child will increase due to respiratory secretions and manifested in the phenomenon of spitting in their sleep. When infants have respiratory diseases, such as coughing, coughing up phlegm, pneumonia, the child will increase the secretion of the respiratory tract and show the phenomenon of spitting while sleeping. Infants with poor immune function when there is no obvious coughing, coughing up sputum, often ignored the child’s trachea and lung inflammation, this time parents need to take the child to the hospital for auscultation, to clarify whether it is inflammation of the lungs and trachea, and need to intervene with medication, if necessary.