The whiteness of the upper teeth bed of the baby’s mouth may be caused by physiological or pathological factors, physiological factors such as eruption of milk teeth; pathological factors such as fungal infections, etc., which can cause the whiteness of the upper teeth bed of the baby’s mouth. 1. Physiological factors: When milk teeth erupt under the baby’s dental bed, the color of the teeth will pass through the weak subcutaneous tissue, making the surface of the dental bed look white. 2. Pathological factors: Oral fungal infections, such as Candida albicans infection, can form a white film-like substance attached to the dental bed, making the dental bed white. Infants on the oral bed white, there may be other reasons, it is recommended to go to the hospital in time to improve the examination to clarify the cause of the disease, under the guidance of the doctor to give targeted treatment or treatment.