Children can eat watermelon in moderation when they have a fever. Generally, when the body heat dissipation increases during fever, there may be unnoticeable water loss, so you should drink more water when you have a fever to replenish the water lost by the body. And watermelon contains a lot of water and vitamin C, moderate consumption can replenish water. At the same time, supplementing vitamin C in children with fever also plays a role in regulating the body’s immune ability. However, in some special circumstances, you should pay attention to the amount of watermelon consumption, or even avoid eating watermelon. If the child has a fever and is accompanied by nausea, vomiting and other gastrointestinal symptoms, try not to give the child ice watermelon, so as not to stimulate the gastrointestinal tract, resulting in gastrointestinal tract dysfunction. At this time, you should give your child some easily digestible and nutritious food to promote the recovery of the disease.