Infant diarrhea usually resolves in 5 to 7 days and rarely lasts longer than 2 weeks. In addition, the duration of infant diarrhea is also related to the cause, severity and response to treatment. If the baby is cold abdomen, eat cold food and other causes of indigestion, followed by diarrhea, can be given abdominal warmth, abdominal massage, oral probiotics such as Saccharomyces boulardii for treatment, mostly within 7 days to cure. If the baby is rotavirus, norovirus or bacterial infection caused by enteritis, manifested as eggdrop soup stool, mucus stool, or even pus and blood stool, after active control of the infection, usually 5 to 7 days to recover. If the baby for lactose intolerance caused by diarrhea, or enteritis caused by secondary lactose intolerance, the course of the disease is longer, more than 2 weeks, or even more than 8 weeks. In short, when the baby has diarrhea, it is recommended to consult the pediatrician in time to clarify the cause and take targeted treatment.