The sudden increase in the number of baby stools is generally considered physiological reasons, indigestion, infectious diarrhea and other reasons. 1. Physiological reasons: babies eat more or add fiber-rich foods, which can lead to food residue or intestinal peristalsis faster, resulting in more frequent stools, observe the normal nature of stools. 2. indigestion: baby stools suddenly increased, and accompanied by thin stools or milk petals, some with bloating, nausea, vomiting and other discomforts, then consider indigestion. Most of them are related to irregular feeding, or the decline of gastrointestinal function after being cold. 3. Infectious diarrhea: baby stools suddenly increase in frequency, stool watery, egg drop soup, or mucus, pus and blood, then consider enteritis, belonging to infectious diarrhea. Some will be accompanied by fever, vomiting, abdominal pain and so on. Sudden increase in the number of baby stools may also have other reasons, it is recommended to go to the hospital, complete the examination to determine the cause of the disease, and then give targeted treatment or treatment.