Girls generally have to start wearing small tank tops when they reach puberty and their breasts start to develop. Girls’ puberty generally starts from about eleven years old, most of the girls will have breast development from about ten years old, and they need to wear small tank tops after breast development. First, it can protect the girl’s privacy. Secondly, it is good for the development of breasts, after puberty breasts will begin to develop rapidly, so wear a small undershirt do not wear particularly tight, it is recommended to wear cotton. In addition, the body of the adolescent girl will also appear a series of other changes, such as long pubic hair, the body becomes more rounded, so in addition to attention to breast care, but also pay attention to the perineal hygiene.