Milk flaps in baby’s stool mainly indicate indigestion. Human breast-fed babies, the stool is yellow or golden yellow, uniform into a paste or with a little yellow stool particles, occasionally slightly dilute and slightly green, not smelly, sour taste, 2-4 times a day, generally after the gradual increase in solid food stool frequency reduced to 1 time a day after 1 week of age. Artificially fed baby stool is light yellow, dry and thick stool, 1-2 times a day. If the stool has a foul smell, it indicates protein indigestion. If the stool is sour and foamy, it indicates sugar indigestion. If the appearance is creamy, it indicates fat indigestion. Milk flaps in the stool, i.e. milk clots, are mostly soap lumps of undigested fat synthesized with calcium or magnesium, which are not clinically significant if the amount is not large.