Newborns always stick out their tongues may be due to the fact that the child is in the micturition period, the salivary glands are secreting vigorously and the development of the nervous system is delayed, and so on. 1. Oral desire period, when the infant is in the oral desire period, the child more through the lips and tongue to feel the external environment, at this time in the parents will have the performance of the tongue. 2. Exuberant secretion of salivary glands, due to the infant’s swallowing function is not fully developed, it will lead to excessive secretion of saliva, when the saliva overflows out of the mouth, the child will use the tongue to lick the saliva. 3. Delayed development of the nervous system, when the child suffers from cerebral palsy and other diseases, it will affect the nervous system, and then the performance of the tongue. Newborns always spit out their tongues, there may be other reasons, it is recommended to go to the hospital in a timely manner, improve the examination to clarify the cause of the disease, under the guidance of the doctor to give targeted treatment or treatment.