I. What is precocious puberty? A: It is generally believed that girls at the age of 8, boys at the age of 9 years old before the appearance of sexual development signs clinically can be judged as precocious sexual maturity. Girls with breast development, boys with increased testicular development as the earliest characteristics. Parents have to pay close attention to the child when bathing or washing clothes to see if there is early development of secondary sexual characteristics and secretions. Second, what causes precocious puberty? A: Besides diseases, the main reason is “hormones”, some of which are ingested and some exist in the environment. With the improvement of living standards, many precocious puberty is “eaten” out. 1, ripe food: now many bad business in order to create the most commercial value in the shortest possible time, in the plant and animal feeding or planting process, the use of a large number of ripening agents, such as ripened poultry and anti-seasonal vegetables and fruits, the consumption of these foods become a high-risk behavior to promote precociousness. 2, fried foods: baked meat, French fries and other excessive heat will be transformed into excess fat in children’s bodies, triggering endocrine disruption and leading to precocious puberty. 3, soy products: soy products contain a lot of soy isoflavones, a kind of phytohormone, more food can also cause premature sexual maturity of children. 4, supplements: some parents love their children, and spend a lot of money to buy cordyceps, ginseng royal jelly and other health products, the original intention is for the child, but the results are harmful to the child, resulting in precocious puberty. 5, cosmetics: mothers apply hormone-containing cream on the breast, young children sucking breast milk together with hormone ingestion, that may induce precocious puberty; young mothers often give children to apply adult face wash, pearl cream, whitening honey and other cosmetics containing hormones, hormones through the skin inhaled into the body, easy to make children appear precocious puberty. 6, some parents oral contraceptive pills are not well stored, the child used as candy to eat, will also lead to precocious sexual maturity. 7, sleep: sleeping too late or sleeping with the lights on will reduce the secretion of pineal melatonin, weakening the inhibition of gonadal development, leading to precocious sexual maturity. 8, psychosocial factors: now many movies and TV adult footage, such as love, hugging, touching, kissing, etc., easy to cause children to imitate, children’s programs mixed with more and more adult language, and even individual children’s cartoons in the character’s clothing is also very revealing, children involuntarily influenced by subtle influence, these environmental stimuli will contribute to precocious sexual maturity of children. 9, environmental factors: modern industry and agriculture, the massive use of detergents and pesticides have seriously polluted the natural environment, resulting in long-term residues and accumulation of hormone-like pollutants in soil, water and plants, and direct or indirect intake by children, which can combine with hormone receptors of reproductive organs and cause abnormal reproductive development. 10, genetic: parents develop earlier, the child often develops earlier than children of the same age. Third, if you suspect that the child is precocious how to do? A: You should go to a regular hospital for consultation. First of all, find out if it is precocious puberty? What kind of precocious puberty is it? What is the level of development? The degree of the condition will be evaluated and a treatment plan will be made according to the individual’s needs. What kind of tests should be done for precocious puberty? 1.Bone age: Take an orthopantomograph of the non-dominant hand (including the wrist bone and the lower end of the radius and ulna), and have the radiologist measure the bone age according to the GP atlas method or TW2 method. Bone age more than 1 year above the physiological age can be considered as advance. 2.Ultrasound examination of the uterus and ovaries: The child’s bladder is moderately filled, and 2D ultrasound is applied to measure the long, anterior and posterior diameters of the uterus; the long, anterior and posterior diameters and transverse diameters of the ovaries; the maximum diameter and number of follicles are measured, and the uterine volume and ovarian volume are calculated using the formula. 3.Magnetic resonance imaging (MRI): At present, boys with precocious puberty and girls with precocious puberty under 6 years of age should undergo magnetic resonance imaging (MRI) of the cranial pterygoid saddle area and related central nerves to determine whether there are intracranial organic lesions and occupational lesions.