It is not recommended to switch milk when children have diarrhea because the intestinal tract is often very disturbed when they have diarrhea, so switching milk can easily aggravate the symptoms of diarrhea and cause abdominal pain, vomiting and a significant decrease in milk consumption. After diarrhea, you should regulate the disorder of intestinal flora and apply probiotics, such as Bacillus subtilis dibacterium granules and Bifidobacterium triplex, etc., and then slowly switch to milk after the diarrhea symptoms have improved. In addition, you should pay attention to the gradual progress when transferring milk, and not be in too much of a hurry, otherwise it will be counterproductive.