Fever due to gastroenteritis should be treated with prompt pain relief, diarrhea, and cooling to rule out the possibility of food as a cause. If the food can be eliminated in time, it can better relieve the symptoms of fever of gastroenteritis. If the fever continues to exceed 38.5 ℃ or more, it may be that the infection is not completely controlled, you can continue to use medication, or you can use antipyretic drugs or physical cooling, use cold towels on the forehead, neck, armpits and so on. Pay attention to timely replenishment of water and salt, you can take oral rehydration salts or plain water with salt and sugar to promote the absorption of water and salt. Diet should be light, avoid spicy and stimulating food.