Baby dilute water stool can be seen in infectious diarrhea, non-infectious diarrhea, there is no fast way to stop diarrhea, need to be treated according to the cause, such as bacterial infections caused by the need for anti-infective, while the need to use montelukast and other treatments. 1. Infectious diarrhea: mostly caused by viral (e.g. rotavirus) or bacterial (e.g. Escherichia coli) infections, the clinical appearance of obvious changes in stool properties, was to dissolve the diluted watery stools, may be accompanied by fever, vomiting and other symptoms. Treatment should be symptomatic with intestinal mucosal protectants (e.g., montelukast) and microecological agents (e.g., Clostridium typhimurium), and oral rehydration salts should be used if dehydration exists. For bacterial infections, antibacterial drugs (e.g., cefaclor) should be actively used to fight infection, while viral infections are often self-limiting and require symptomatic supportive treatment. 2. Non-infectious diarrhea (1) food bait diarrhea: mostly caused by improper diet, treatment needs to adjust the diet, appropriate care, oral microecological agents (such as Saccharomyces boulardii) and other treatments. (2) Sugar diarrhea: mostly refers to lactose intolerance, often caused by absolute or relative lack of lactase in the intestinal tract, treatment requires the use of lactase or the use of de-lactose diet. (3) allergic diarrhea: these babies can be accompanied by eczema and other symptoms, some may have symptoms of bloody stools, formula milk feeders need to be adjusted to hydrolyzed protein formula milk treatment. All of the above drugs should be used under the guidance of a physician, and it is recommended to actively seek medical attention from a specialist to determine the treatment.