If a child has diarrhea or fever, the first thing to do is to check the blood and stool routine. If there is an increase in white blood cells and neutrophils in the blood test or white blood cells in the stool test, it means that the diarrhea and fever are caused by bacterial infection. You need to take antibiotics for anti-inflammatory treatment, such as pediatric cephalexin granules and pediatric cephalexin hydroxybenzyl granules. If the diarrhea and fever are more serious, the effect of oral anti-inflammatory drugs is not enough, you need to take intravenous antibiotics for anti-inflammatory treatment, and you need to use Simethicone for anti-diarrheal treatment. If the fever is above 38.5 degrees, oral ibuprofen suspension is also needed to reduce the fever. If there is no elevation of white blood cells, the fever is often caused by viral infection, so you can take probiotics to regulate the intestinal tract, and oral rehydration solution to maintain electrolyte balance, and Simethicone to stop diarrhea. If the fever is above 38.5 degrees, oral ibuprofen suspension is also required.