Precocious puberty is defined as the age at which any of the sex characteristics appear 2 standard deviations earlier than the average age of the normal population. It is now generally accepted that precocious puberty can be diagnosed as the development of secondary sexual characteristics or the onset of menstruation before the age of 8 for girls and the onset of sexual development before the age of 9 for boys. Since sexual development is related to many factors and human growth and development is a continuous process, there is not a very precise boundary. The hazards of precocious puberty 1, very easy to cause psychological barriers to children: premature appearance of sexual signs and development of reproductive organs will lead to psychological barriers in immature children, especially when they see their own traits different from those around them is very easy to cause children’s inferiority complex, this kind of psychology, is likely to remain in their adult life legacy. 2, so that the child distracted, affect their studies: should be said: the emergence of sexual characteristics and the development of reproductive organs will certainly distract children, especially girls, premature menstruation will often make them feel uneasy, shy and nervous. At the same time, the girl’s body develops too early and is not capable of dealing with the effects of menstruation on her life, which will inevitably affect the child’s reading and studying. 3, affect the child’s height, resulting in their height shorter than their peers: children with precocious puberty are often accompanied by accelerated bone growth, making them appear taller than children of the same age. In fact, this is only a temporary phenomenon, due to the early rush of sex hormones, resulting in epiphyseal closure will also be much earlier, the growth period is correspondingly shortened. In general, girls can only grow about 5 cm on average within 3 years after menarche and boys after their first ejaculation, so children with early sexual maturity will be shorter than their peers. 4, can cause the child systemic endocrine disorders: children with mild symptoms mainly show the disorder of sex hormone levels, while children with serious symptoms will lead to systemic endocrine disorders, such as hyperadrenocorticism will trigger the child systemic hairy symptoms, and conversely, children with low adrenocorticism will show a reduction in hair, dryness, even accompanied by the loss of pubic and axillary hair …… This is only the external manifestation of endocrine disorder on hair, there are many systemic symptoms, and many hazards. 5, cause early sexual behavior: the psychological development of precocious children and physical development is extremely mismatched, coupled with the small physiological age of patients, shallow social experience, poor self-control, easily lead to their early sexual behavior, thus triggering the risk of pregnancy and the spread of sexual diseases. In addition to disease causes, precocious puberty may also be related to unreasonable diet, over-nutrition, indiscriminate supplementation, premature sexual information stimulation, and excessive light exposure. Blame food? Many news reports show that those children with precocious puberty may have eaten such and such foods, instant chicken, anti-seasonal vegetables, soy products, colostrum, milk powder …… are really a lot of foods that have been shot. But really look deeper, you may find that the real reason is that their nutritional status is too good. Nowadays, children are living in much better conditions than before, and the problem of overweight and obesity is becoming more and more serious. So if your child has precocious puberty, first think about whether it is over-nutrition. The most important thing is to go to the hospital as soon as possible to rule out organic lesions.