If you can’t erase the gums on both sides of your 4-month-old baby, consider it to be “horse teeth” or dental embryos are developing, if there is a layer of film or flakes, consider it to be thrush, if parents can’t tell, go to the hospital stomatology department for examination. 1, horse teeth: If it is horse teeth, don’t worry, it will naturally fade. The “horse teeth” is a common physiological phenomenon, and not a real tooth, generally no discomfort, does not affect the development of infants eating milk and milk teeth, infants sucking milk in the process of teeth and nipple friction, “horse teeth” can fall off on their own, no special treatment. But parents should not take a needle to pick, or cloth to wipe, because the baby oral mucosa is very thin and tender, rich in blood vessels under the mucosa, the baby’s own resistance itself is very weak, needle pick and cloth wipe damage to the oral mucosa, easy to cause bacterial infection, stomatitis; 2, embryonic development: if the embryonic development of teeth, because the gums are squeezed, will also appear more white, without treatment; 3, thrush: Candida infection When it leads to thrush, the gums will be white because of the white appearance when Candida multiplies and gathers in large numbers. It will be necessary to keep the mouth clean to prevent fungal reproduction, can be wiped with external sodium bicarbonate solution, but also supplement probiotics, parents should usually pay attention to the cleanliness and hygiene of feeding, eating utensils and nipples before feeding to wash clean.