Precocious puberty is defined as the appearance of secondary sexual characteristics before the age of 10 for boys and 8 for girls. It is divided into true precocious puberty and pseudo-precocious puberty. In precocious puberty, girls have breast development and even pubic hair and menstruation, while boys have enlarged testicles and penis, and pubic hair. In the early stage of precocious puberty, due to the early and large secretion of sex hormones, the growth rate of children with precocious puberty is significantly faster than children of the same age and sex at this time, and the height increases significantly, and the bone age is earlier than the actual age. However, due to the stimulation of sex hormones, the epiphysis closes early and growth stops early, resulting in a short stature in adulthood eventually. Therefore, children with precocious puberty should go to a regular medical institution as soon as possible for regular treatment.