1. In children with idiopathic (true, central) precocious puberty, the main danger is that the short growth period may result in a shorter adult height due to a short growth period. Due to the premature initiation of puberty, premature acceleration of physical growth, early epiphyseal fusion, shortening of the growth period, and early cessation of growth. This results in a lower final adult height than that of children of the same age who develop according to normal puberty. Take girls for example: normal girls grow about 20~25CM throughout puberty, normal girls begin to develop when their height reaches or approaches 140 at around 10, and adult height may reach or approach 160~165CM , if true precocious children, their height begins to develop at around 130CM. 2, precocious children although the development of sex characteristics in advance, but the level of psychological and intellectual development is still the actual age level, premature appearance of sex characteristics and reproductive organ development will lead to immature children psychological disorders, girls early menarche, but also bring a lot of inconvenience to life, serious cases even affect reading and learning. 3, premature sexual maturity, and the lack of self-protection, may also be more vulnerable to injury. 4, some precocious sexual maturity is due to the appearance of tumors in the body, these tumors can secrete substances similar to sex hormones, and sometimes when the tumor is still small, the amount of sex hormones it secretes is already large enough to cause sexual development, so children with precocious sexual maturity must see a doctor in time for early diagnosis and treatment. 5. It has been reported that the increased incidence of tumors in estrogen-sensitive target organs, such as breast, endometrium and ovary, in children with precocious puberty may be related to the high sensitivity of individuals to estrogen. Is early menarche in girls likely to lead to a slightly earlier menopause in the future? In both boys and girls, if they mature too early in childhood, is there a risk of premature aging in adulthood? These are all questions worth considering.