Breast development at the age of eight may belong to precocious puberty, which is categorized into peripheral precocious puberty and central precocious puberty, the former will not affect height while the latter will. Generally normal girls will enter puberty around the age of 9-11, breasts begin to develop, menstruation begins, etc. If the girl’s breasts begin to develop at the age of eight, it is generally precocious puberty. Precocious puberty is categorized into peripheral precocious puberty and central precocious puberty. Peripheral precocious puberty does not have much effect on height, while central precocious puberty may affect the level of growth hormone in the body, which will have a certain effect on height, and it is necessary to go to the hospital in time to do the age of the bones and the level of sex hormone test. If a girl’s breasts are developing at the age of eight, it is advisable to consult a doctor in time to clarify the cause of the disease and target treatment. Whether or not it affects your height, you need to consult the relevant specialized doctors.