Breast development in a seven-year-old girl, who is otherwise normal, is considered to be precocious puberty. Precocious puberty can be categorized into pseudo-precocious puberty and true precocious puberty, and treatment includes general treatment and medication such as gonadotropin-releasing hormone analogs. 1. Pseudo-precocious puberty: Breast development in seven-year-old girls may be related to obesity, children taking contraceptive pills by mistake, taking estrogen-containing food for a longer period of time, or using estrogen-containing articles externally, which generally do not require special medication. Children should be urged to develop good living habits, actively participate in physical exercise to avoid obesity; avoid exposing children to hormone-containing cosmetics, medications, and snacks, and develop good eating habits. 2. Genuine precocious puberty: Gonadotropin-releasing hormone analogs are commonly used at home and abroad for children’s genuine precocious puberty, and the commonly used drugs in China at present include treprostinil, leuprolide acetate, etc. All these drugs should be used under the guidance of a doctor. All of the above medications should be used under the guidance of a doctor to avoid self-medication. Breast development in seven-year-old girls may also have other causes, it is recommended to consult a doctor in a timely manner, with the help of a doctor to clarify the cause of the disease, and early formal treatment.