The yellow color of the newborn’s gums is not necessarily normal. The cause of the yellow color of the newborn’s teeth bed may be physiological reasons, but also may be due to jaundice, congenital genetic metabolic disease and other pathological reasons. 1. Physiological factors: mainly due to inadequate oral hygiene, such as breastfeeding before and after not timely clean up the milk residues in the bed, or a long time with a pacifier to sleep, etc., will lead to the proliferation of bacteria in the bed of the teeth, resulting in the yellow bed of the teeth phenomenon. 2. Pathological factors: (1) Jaundice: Jaundice is a common symptom in newborns. Due to the abnormal metabolism of hepatic bilirubin, the concentration of bilirubin in the blood serum increases, causing the symptoms of yellowing of the skin of the whole body, which may also cause the yellowing of the dental bed. (2) Inherited genetic metabolic diseases: such as congenital anemia, hepatic cysts and other diseases, can also cause an increase in the content of pigment cells in the bed of the teeth, showing the symptoms of the bed of the teeth is yellow. If a newborn baby has symptoms of yellowing of the dental bed, and cannot subside on its own, it is recommended to go to the hospital for consultation, to clarify the cause of the disease, and to standardize the treatment under the guidance of the doctor.