Precocious puberty can be diagnosed if the development of secondary sex characteristics occurs before the age of 8 for girls and 9 for boys, or the first menstruation occurs before the age of 10 for girls, when precocious puberty occurs, due to the early secretion of a large amount of sex hormones, which accelerates the growth of bones, the bone age is earlier than the actual age, and the epiphysis will heal earlier, thus shortening the years of pubertal growth, therefore, after 2-3 years of accelerated growth, the precocious child’s Therefore, after 2-3 years of accelerated growth, the height growth of children with precocious puberty starts to slow down and stops growing before reaching normal adult height, resulting in short stature of children with precocious puberty. So how can parents detect precocious puberty in their own children at an early stage? Here are a few simple self-testing methods for parents: a. If you have a pre-pubescent child at home, parents can regularly measure the child’s height every month (note that the measuring device should be the same for each height measurement), and if you find that your child’s height suddenly accelerates, parents need to be alert to the possibility of precocious puberty. If your child is a girl, the mother should regularly check the size of your child’s breasts and vaginal discharge every month. If your child is a boy, the father should regularly check the child’s penis size, testicle size and scrotum size changes every month. Parents should also pay attention to the development of the child’s body hair, such as the armpits, pubic area, body hair around the mouth and lips, if you find that the child’s body hair has increased or has deepened in color, you should be alert to the possibility of precocious puberty. Parents of boys should also pay attention to the child’s voice change.