Girls 8 years old long pubic hair, breasts protruding, usually two years or two and a half years or so will come to menstruation. Girls growing pubic hair and breasts protruding is a manifestation of entering puberty, when a girl enters puberty, due to the increase in the level of sex hormones in the body, so there will be the appearance of secondary sexual characteristics, breasts will begin to develop and gradually protruding, and will slowly grow armpit hair as well as pubic hair. About two to two and a half years after the onset of secondary sexual characteristics, girls begin to experience their first menstruation as their hormone levels rise and the lining of the uterus matures. Generally speaking, the average age at which a girl’s body begins to develop is around 9 to 10 years old, so it is relatively early for secondary sexual characteristics to appear at around 8 years old. It is recommended that girls go to regular hospitals to clarify the causes of their secondary sexual characteristics, and then adopt appropriate solutions under the guidance of the doctor.