Due to the popularization of science, many parents are now generally aware that precocious puberty affects adult height. Precocious puberty not only affects height, but also has many psychological effects on the child and adds a lot of trouble to the child’s care. When the child enters the second sex characteristics development period, the height growth accelerates, usually 8-10 cm a year (some children do not grow so fast), and at the same time, the bone growth also accelerates. The age of bone development is indicated by the state of bone development in the left wrist. Normally, the bone age and the actual age are the same, one year of age is one year of bone age. In the second sex characteristics development period, height growth accelerates, due to the role of estrogen, bone age growth is even faster, one year of age can grow 2-3 years of bone age, so that the epiphysis closes early and growth ends early. Early growth ends early, due to insufficient growth time, adult height instead of high. Children enter the puberty development period, often have psychological changes, emotional often unstable. Easily irritable, good temper, easily distracted, like the opposite sex, like to read love TV, novels, etc., some children’s academic performance decline. Due to the immaturity of the body, the interval and duration of menstruation are often unstable, sometimes long and sometimes short, the amount of menstruation can be more or less, and children are small and have a big burden to deal with this kind of things. In the last twenty years or so, there have been medications to control and treat precocious puberty with good results. However, it has to be started at an early stage of development to achieve good results. Currently, there are medications to control and treat precocious puberty, including Chinese medicine and Western medicine (injections). Chinese medicine is taken orally, easy to use and low cost. When used at the early stage of development, it can control the development and delay the developmental period, but if it is already in the middle or late stage of development, the effect is not good. Western medicine is an injection, usually one injection a month. It can not only control the development effectively, but also control the rapid development of bone age, prolong the growth period, win the time needed to grow taller, and improve the adult height, but it should not be treated too late. Currently, it is advocated to start treatment before the age of 11.5 years for girls and 12.5 years for boys. The development of secondary sexual characteristics and the rapid growth period are only two or three years away, and treatment is not effective if this period is missed. This requires parents to pay attention to their children’s development and to have them seen by a specialist as soon as they start to develop, and they need to be continuously observed. Over the past twenty years, I have often encountered the following situation among the children I have seen. Some parents bring their children to see the doctor after the girl has had her period and the boy has changed his voice for some time. At this time, the child’s bone age is old and there is limited room for height growth, and medication can control development but does not do much to improve adult height. Some parents and children are so sorry to hear that the epiphysis is closed or close to being closed that they cannot grow any taller or have limited room for growth that they even shed tears on the spot. Some parents found that their child had breast development and brought their child to see them in time. After the examination, the doctor told the parents that the child had just started to develop and that they should not use any medication for the time being and should pay attention to the development. The parents thought it was fine and didn’t pay any more attention. After a year, they found that the child’s breasts were close to maturity and the bone age had grown by 2-3 years in a year’s time. The development of secondary sexual characteristics in girls is usually the earliest when the breasts start to grow. It is easy for parents to detect breast development in girls, and most children feel breast pain at the beginning of breast development and will take the initiative to express it to their parents, so it is easy to detect some early development in girls. The earliest secondary sexual characteristics development in boys is the beginning of testicular growth. Most parents don’t pay attention to the testicular development of boys, and often think that the child may have developed only after the child grows a moustache and becomes vocal, when in fact the child has already developed for a period of time. Precocious puberty in boys is often discovered later. Precocious puberty control treatment starts early and long enough to delay development and improve adult height. In recent years, there is a general trend of early development of secondary sexual characteristics, parents should pay attention to it and should continuously observe it and bring their children to the clinic in time to avoid losing the opportunity to control the treatment.