Tonsils may atrophy after the age of 10. The age of tonsil atrophy varies, with most children having tonsil atrophy at age 13. The tonsils are important immune organs of the body, located between the palatopharyngeal arch and the palatoglossal arch, and are the largest immune organs in the human pharynx. Under normal circumstances, with the gradual growth and development of children, exposure to allergens gradually increase, tonsils gradually increase, especially 6 to 7 years old tonsils increase more obvious, this period is physiological hypertrophy. After puberty, due to the tonsil’s immune function gradually decline, then the tonsils will gradually physiological atrophy. 10 years old after the children’s tonsils can appear atrophy, is a normal physiological phenomenon. In general, most children will experience tonsil atrophy at the age of 13. Tonsil atrophy period should pay attention to oral hygiene, to avoid infection caused by tonsil inflammation, such as discomfort, should promptly rushed to the hospital, under the guidance of professional doctors for treatment.