Many parents believe that it is normal for children to develop early and be tall because of good nutrition nowadays. However, they do not know that these phenomena may not be a good thing. If the early growth is caused by precocious sexual maturity, it will affect height development and eventually cause short stature as an adult. 1, normal sexual development Under normal circumstances, girls usually appear in more than ten years old when the development of secondary sexual characteristics, such as breast development, pubic hair growth, menstruation, etc.. For boys, testicular development, beard growth and other secondary sexual characteristics begin to appear at the age of 12 or 13. If a girl develops breasts before the age of 8, and a boy develops testicles before the age of 9, it is precocious sexual maturity. 2, the hazards of precocious sexual maturity Precocious sexual maturity can cause both psychological and physical harm to children. The child may have low self-esteem, fear and anxiety because he or she is different in size and appearance from his or her surrounding buddies. Early menstruation in girls often affects their normal life and studies. Boys may develop a tendency for early love and premature sexual behavior. As precocious children are often accompanied by accelerated skeletal growth, although temporarily seem to grow faster than others, but early to use up the part to grow later, the more ahead of time, the faster the height growth stops, but will grow up to be short. The more you look ahead, the faster your growth will stop, and you’ll be short when you grow up. 3. True precocious puberty is now clinically recommended for gonadotropin-releasing hormone analogue treatment, which can stop the development of secondary sexual characteristics, and can also slow down the progression of bone age and improve lifetime height. However, growth deceleration may occur during the application of this drug, and the growth rate will generally drop back to about 5 cm/year after six months of treatment. In recent years, the combination of gonadotropin-releasing hormone analogs and recombinant human growth hormone is mostly used internationally to overcome the growth deceleration problem. The vast majority of precocious puberty can be cured, but early detection and timely treatment are very important. With early detection and timely treatment, patients with precocious puberty can achieve a normal psychological state and desired adult height, and the earlier the treatment, the better the results.