Foam and mucus in baby’s stool suggests indigestion. Normal breastfed babies have yellow or golden yellow stools, uniformly creamy or with a few yellow stool particles, occasionally slightly dilute and slightly greenish, not smelly, with a sour taste, and have 2-4 bowel movements per day. Artificially fed babies stool for yellowish and grayish yellow, more dry and thick, because milk contains more protein, feces can also have obvious protein decomposition products of the odor, stool 1-2 times a day. If the stool has a foul odor, it indicates protein indigestion. Acidic odor and foamy stools indicate poor digestion of carbohydrates and vigorous fermentation in the intestines. If the stool looks like cream, it means fat indigestion, and the milk petals in the feces are mostly undigested fat with calcium and magnesium synthesized into soap lumps.