The tonsils of children without lesions are generally not enlarged and will not atrophy. If the tonsils are often inflamed, resulting in enlarged tonsils, they usually start to atrophy gradually from adolescence. The tonsils are located in the tonsillar fossa of the human palate and are oval in shape, one on each side, and symmetrically distributed. The tonsils produce lymphocytes and antibodies, and therefore have the function of fighting bacteria and viruses. Due to the imperfect immune function of children and the increasing exposure to pathogens during their growth and development, the tonsils are easily and repeatedly inflamed and enlarged due to the immune function of the tonsils. Usually, the tonsils of children between the ages of 3 and 5 years old will begin to increase in size, and between the ages of 6 and 10 years old the enlargement is more obvious and belongs to physiological hypertrophy. In adolescents, due to the maturation of their immune function, the immune function of the tonsils gradually decreases, and the tonsils begin to gradually shrink. If adolescents between 15 and 18 years old still have recurrent inflammation of the tonsils, it is recommended to go to the pediatric department of a hospital in time to have the condition clarified and then treated appropriately to avoid other serious diseases.