Generally puberty in boys begins at the age of 10-13 and penis growth mostly stops around the age of 20. Depending on individual differences in growth and development, some people may continue to develop briefly later, and some of these children develop early or late, and there are individual differences. Growth and development are mostly related to genetics, own diet and external environment. In boys, pubertal development begins with significant changes in appearance, such as the appearance of a beard and prominent throat nodes, and a dramatic increase in height and weight. In addition to the development of appearance, children may also experience significant development of sexual organs, such as the growth of pubic hair, testicular growth and penis growth. According to statistics, boys mostly stop growing their penis around the age of 20. It is recommended that boys should participate in physical exercise, get proper sun exposure, ensure sufficient sleep, and usually pay attention to eating more fresh fruits and vegetables, dairy products, soy products, lean meat, walnuts, peanuts and other foods that are conducive to growth and development.