Milk flaps in a newborn baby from formula milk may be caused by the high protein content in the formula milk, which is normal, but it may also be caused by indigestion, etc., which is not normal. Milk powder contains a lot of protein, such as casein. When casein enters the stomach, it combines with stomach acid to form a white flocculent, which is then excreted in the stool as milk flakes. The milk powder your baby drinks may have a high casein content, so it is easy for him to have milk flaps. This is a normal phenomenon, just observe. The development of the baby’s digestive organs is not yet perfect, the digestive ability is relatively weak, if the amount of formula feeding too much, the concentration of formula is too large or the diet varieties suddenly changed, resulting in the baby’s digestive organs have not adapted to, resulting in indigestion, may appear to pull milk petals, which is not normal. If your baby has a milk flap with obvious discomfort, it is recommended to go to the hospital in time for examination.