Infantile diarrhea, is a clinical syndrome caused by different etiologies. It occurs mainly in infants under 2 years of age and can be divided into two acute types. Light diarrhea: a few times a day to more than ten times a day, feces in the form of egg-flake soup, occasional overflow and vomiting, mild abdominal distension, etc.; heavy diarrhea: more than ten times a day, up to dozens of times, watery stools, vomiting, fever, gray, irritable, or even coma, convulsions, and water loss, electrolyte disorders and other symptoms. Infants and children with diarrhea should be alert to these symptoms 1. Be alert to elevated body temperature The temperature response to infant diarrhea is mainly fever, and most of them are moderate fever (about 38.5°C). This is commonly seen in diarrhea caused by E. coli, Campylobacter jejuni, Bacillus dysenteriae, Salmonella, rotavirus, enterovirus, etc. The fever may precede the diarrhea or start at the beginning of the diarrhea. At the same time, the child also shows signs of non-playfulness, reluctance to eat, wheezing, and crying. Some pathogens cause diarrhea without fever, and even slightly below normal body temperature. It is necessary to be alert to the high fever (above 39℃) that appears during or earlier than diarrhea, which is a symptomatic manifestation of bacterial toxin poisoning, and promptly seek medical attention. 2. Be alert to mental depression Generally, children with mild diarrhea do not show symptoms such as mental depression, drowsiness, convulsions, coma, etc. Once some of these symptoms appear, especially those earlier than diarrhea or at the beginning of diarrhea, prompt medical attention should be sought. 3. Be alert to dehydration If the child has a large number of diarrhea, a large volume of bowel movements and a lot of water loss, symptoms of dehydration may appear.