The two most common causes of white teeth bed in newborns are horse teeth and erupting milk teeth. When these two conditions occur, parents need not worry excessively, as long as they pay attention to oral hygiene. However, there may be fungal infections in the mouth or ulcers in the mouth that cause white teeth, and parents need to pay attention to these two cases. A normal phenomenon: 1, horse teeth: this is a normal physiological phenomenon. In the newborn gums can be seen on the yellow-white particles, commonly known as horse teeth, can exist for a longer period of time, the later will fall off on their own, do not pick to prevent infection; 2, the eruption of milk teeth: newborns from about six months onwards milk teeth will begin to erupt in turn, the early will also appear in the case of white teeth, parents need not worry, pay attention to observe can. Second, the abnormal phenomenon: 1, fungal infection: because of the weak resistance of newborns, the oral cavity is prone to Candida infection, at this time so that the white teeth bed is a pseudomembrane, that is, Candida mycelium attached to it, wipe off with gauze will appear after the red and congested mucous membrane; 2, ulcers: ulcers in the mouth of newborns, may be due to bite hard things such as hard toys, due to the newborn oral mucosa Very fragile, so we should try to avoid the behavior of newborns gnawing at will.