Boys enter puberty around the age of 12 Puberty is a transitional period of growth and development during which boys undergo significant physical and psychological changes. Generally speaking, puberty begins around the age of 12 for boys and around the age of 10 for girls. Puberty can generally be divided into three stages, namely, early puberty, middle puberty, and late puberty. The most notable feature is the appearance of secondary sexual characteristics, such as the second development of height and weight, seminal emission, and voice change. Psychologically, there are also stages of personality and social development and so on. It should be noted that at this stage, both boys and girls are at a very sensitive stage both physically and psychologically. In life, you should always pay attention to your physical and mental changes, and actively participate in the education and health knowledge of puberty. If you encounter doubts or physical problems about puberty, you can consult a professional doctor for help.