The 8-year-old girl breast pain may be related to precocious puberty, because the girl’s second feature development is usually between the ages of 9 to 13 years old. 8-year-old girl breast pain belongs to the early development of the second sex characteristics, belongs to the precocious puberty a characteristic, precocious puberty treatment is divided into the adjustment of lifestyle and drug treatment. 1. Lifestyle adjustment: Parents need to let the child more exercise, the purpose is to prevent the child obesity. At the same time, do not let the child eat estrogen and androgen-related drugs, food, etc., and do not let the child eat non-doctor-recommended supplements. And parents should also pay attention to the child’s emotions, to communicate with the child, to relieve the child’s psychological pressure. 2. Medication: If the effect is not satisfactory after adjusting the lifestyle or the precocious puberty is more serious, it is necessary to be treated by medication, which can be taken under the guidance of the doctor, such as treprostinil, leuprolide and so on.