How does the child vomit diarrhea still have a fever to do

Children vomiting diarrhea also fever may be eating deterioration, unclean food caused gastroenteritis, to let children drink more water, can drink sugar salt water to supplement electrolytes to prevent dehydration, oral montmorillonite powder antidiarrheal, try to physically cool down, can be children massage or warm water dip towel to wipe the body to help antipyretic.