Puberty for boys generally starts at the age of 10-13 and ends at the age of 18-20. Adolescent boys can grow roughly 25-28 cm taller, but height is related to genetics, nutrition, epiphysis and other factors, and there will be some individual differences. Boys generally begin to enter puberty at the age of 10-13, secondary sexual characteristics begin to develop, testicles gradually grow, height begins to change significantly, generally after about two years, the growth rate of height reaches a second peak, when boys grow to about 15 years old, in most cases up to 95% of the final height. When boys reach the age of about 20, the epiphysis gradually closes and the height basically does not change again. However, the growth period is not absolute and varies widely among individuals. First, when boys are influenced by genetic factors, epiphysis closure time is later, can make boys grow longer period, growth higher; Second, if boys in adolescence more adequate nutrition, so that the body functions better to play a role in promoting bone growth, can also help boys height growth more, so for some boys, at the age of 20-22 years old can also appear to grow taller. Conversely, it is also possible that during puberty, height growth will stop. In addition, after boys enter puberty, they should develop good living and eating habits, increase physical exercise, and maintain adequate nutrition to help growth and development. For boys with slow height development, parents should promptly take their children to check for abnormalities and take appropriate ways to help alleviate the problem as soon as possible.