Children are likely to have a reduced appetite for many foods during a cold or fever. Because watermelon is cooler, it is likely to want to eat watermelon, but it is best not to give it to him. Because the function of the gastrointestinal tract is reduced during a child’s cold or fever, the appetite will also be reduced, and he will not want to eat many things when he sees them. It is best to give the child warmer food at this time, too cold watermelon is likely to lead to a further decline in gastrointestinal digestive function, and in serious cases may even lead to diarrhea. If the child’s appetite is not significantly reduced, the gastrointestinal digestive function is very good, not much picky food, then you can eat 1-2 bites, a trial attempt. If the child does not feel any discomfort after eating, you can give 1-2 more bites at the next meal, but the amount of food should not be too much.