The tonsils of children begin to enlarge gradually around the age of 1 year, reaching their peak of development between the ages of 4 and 10 weeks, and gradually shrink as the child gets older, gradually degenerating between the ages of 14 and 15 years. Therefore, tonsils in infants are rare, and tonsillitis in infants is also rare. Inflammation of the tonsils in children can cause symptoms such as persistent high fever and sore throat. The tonsils of children develop gradually and have a preliminary immune effect before they degenerate, so that they can effectively resist infections in the mouth and prevent infections in the mouth from spreading to the lower respiratory tract. Therefore, it is very important for children to protect their tonsils and eat less cold food.