The specific manifestations of precocious puberty in boys are as follows: first, there will be changes in the sexual organs, there will be an increase in the volume of the testicles, penis thickening, accompanied by the appearance of pubic hair, axillary hair, a process of gradual increase, there will also be a period of voice change, from male children into adult male voice changes. Second, when the symptoms of precocious puberty appear, the child will experience a sudden increase in height, from a steady increase in height to a sudden jump in height, which is also a manifestation of premature growth of the epiphysis. Third, it will show the change of psychological behavior, due to the premature change of hormone level, children will suddenly become interested in sex organs and knowledge of sex, and will show some of the above behaviors and knowledge of their own body organ changes, etc.