A girl who develops before the age of 8 weeks or a boy who develops before the age of 9 weeks should be examined at a hospital. Sometimes parents are not sure when their child developed. Although the child’s age is no longer considered precocious, if the development is already more obvious, it is recommended to visit the hospital as well. Some children are fat and their breasts look as if they are developing, so it is best to check the ultrasound of the breasts, except for breast development. The main thing is to see if there is breast development, breast enlargement or (and) breast tenderness, secretions in the underwear, and pubic hair in some children. 2. Boys: Observe if there is pubic hair and if the penis becomes longer and thicker. What tests are needed for children with precocious puberty? 1. Bone age: To determine whether the bone age is early and to predict the adult height. 2. Sex hormone level: To check the sex hormone six items in general. 3.B ultrasound: check the breast, uterus, ovaries, follicle size (or boy’s testicle size) to determine the sexual development, also need to check the adrenal function or ultrasound. 4.Pituitary magnetic resonance imaging (MRI): because the pituitary gland is the central system of endocrine, especially suspected of central precocious puberty, need to check. 5.Some children with precocious puberty also need to check the alpha-fetoprotein (AFP) and chorionic gonadotropin ( In some children with precocious puberty, AFP and HCG should be checked to exclude germ cell tumors and thyroxine levels (low thyroid can cause precocious puberty). 6. For those who are more likely to have true (central) precocious puberty, LHRH excitation test, referred to as sex hormone excitation test, should be checked to determine whether it is true or false precocious puberty. How to distinguish between central (true) and peripheral (pseudo) precocious puberty (a) Central precocious puberty: 1. Early appearance of secondary sexual characteristics: before the age of 8 years for girls and 9 years for boys. 2. Increase in serum gonadotropin level to puberty level. 3. Enlarged gonads. 4. Accelerated linear growth. 5. Bone age exceeding the age by one year or more. 6. 6.Serum sex hormone level is elevated to pubertal level. (2) Peripheral precocious puberty: Various reasons for the elevation of sex steroid hormones to puberty level, so only the early appearance of secondary sexual characteristics, without a complete sexual development program. Bone age is often not obvious in advance. The first thing you need to do is to take Chinese medicine, for example, the Great Tonic Yin Pill and the Zhi Bai Di Huang Pill, once in the morning and once in the evening, taking into account the long-term effect on the stomach and appetite, it is recommended to take them after meals. 3. The actual GnRH-a needle is needed to inhibit the development of the GnRH-a needle, currently commonly used in the Dafirin needle and inhibit that the needle. 4, every month to the hospital to review the monitoring of height growth and sex characteristics control, every six months to review the bone age and uterine ovarian ultrasound.