For girls, generally in 9 ~ 13 years old began to enter puberty, at this time in the role of androgens, pubic hair, armpit hair and other secondary sexual characteristics gradually appeared, and the girl will also be in this period of breast development and menstruation, this time the parents do not need to be too nervous, pay attention to let the child to develop good habits can be. At the same time, it should also be noted that some girls due to daily intake of large amounts of fried chicken, hamburgers and other junk food or stay up all night and other bad habits, may lead to endocrine disruption, so be alert to the occurrence of precocious puberty. In normal life, girls need to pay more attention to strengthen exercise, improve the body’s immunity. Daily attention to diet light, easy to digest, pay attention to reasonable collocation, balanced nutrition, if the child has developmental abnormalities, it is recommended that parents take the child to the regular hospital pediatrics, clear cause of the disease under the guidance of the doctor active treatment.