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 10 for boys. There are many causes of precocious puberty, which can be divided into two categories: central (true) and peripheral (pseudo) according to whether the hypothalamic-pituitary-gonadal axis function is activated early. What are the current causes of increased precocious puberty? 1, daily diet (1) premature animals, poultry meat, especially poultry neck: nowadays, the poultry sold in the market, the residues of “maturation promoter” in poultry meat are mainly concentrated in the glands of the head and neck part of poultry, therefore, eating the neck of chicken, duck and goose becomes “premature”. Therefore, eating the neck of chicken, duck and goose becomes a high-risk behavior of “precocious maturation”. (2) Anti-seasonal vegetables and fruits are in-season or ripen early with the help of “ripening promoters” and should be avoided for young children. (3) foreign fast food, fried food: children who patronize foreign fast food more than twice a week, and often eat fried puffed food, the possibility of “precocious maturity” is 2.5 times more than the average child. 2, health products (1) can be used in the medicine of the great tonic food. Including cordyceps, ginseng, dried cinnamon, dried lychee, astragalus, sage, etc. Chinese medicine points out that the more tonic type of medicine, the easier it is to change the normal endocrine environment of children, resulting in an imbalance in their physical and mental development. (2) Some oral liquids for children. Many of the supplements and oral liquids marketed for children that boast of “growing taller and stronger” contain hormones. These hormones make children grow taller and stronger than children of the same age when they are five or six years old, and their bone age has reached 8 or 10 years old. But when the child enters the normal development stage, but do not see the growth. (3) Excessive zinc supplementation, protein powder and other supplements. Pediatric endocrinologists believe that children should not take supplements because many children with precocious puberty are eaten out. Therefore, experts remind parents that healthy children can obtain good growth and development as long as they eat normally and participate in regular exercise. For children in pubertal development, 6-8 years old girls and 7-10 years old boys, they should never pay attention not to take supplements indiscriminately for a long time. 3, environmental pollution The influence of hormone-like pollutants in the environment, such as detergents, pesticides, and plastic products will produce some substances, to the atmosphere after decomposition will produce estrogen-like active substances, these substances may children through ingestion, or skin access, resulting in precocious puberty, so the cause of pollution is now also quite an important cause. Because children are sensitive individuals, and his growth and development process to these things sensitive than adults are much more sensitive. 4, adult cosmetics Children’s skin is thinner than adults, plus children’s sebaceous glands are not mature, sebum secretion is less, the skin’s defense barrier function is weaker, sensitive to external stimuli. Most adult cosmetics contain fragrances, preservatives and various organic compounds and other chemical ingredients, which can easily enter children’s bodies and lead to allergies. Doctors remind that some cosmetics now have added glucocorticoids or estrogen, and the long-term use of such cosmetics by children may cause hormone-dependent dermatitis, or precocious growth and development of children. 5, media stimulation With the development of media, such as newspapers, television, the Internet and so on are related to the sexual development of the content increases, children may involuntarily hear and see, will also stimulate the hypothalamus pituitary nerve reflexes, so sometimes also have the hypothalamus pituitary gonadal axis of early start, this factor still need to pay attention to.