You can eat blueberries for fever. Blueberries are highly nutritious, which are rich in vitamins, proteins, and also contain iron and carbohydrates. It will not affect immunity or aggravate fever. Blueberries contain pectin, which can promote gastrointestinal peristalsis, for people with weak gastrointestinal function, do not eat more. When the body temperature rises during fever, the body will lose extra water and sweating will increase. Be sure to replenish water, you can drink more warm water. The body’s immunity decreases after a fever and lacks vitamins, you can also eat nutritious fruits, such as blueberries and apples. Both can replenish water and vitamins.