According to your description, if any of the following conditions are met, it can be determined as premature puberty: ① Boys showing secondary sexual characteristics before 9 years old, girls before 8 years old; ② Girls showing secondary sexual characteristics after 8 years old, but having their first menstrual period before 10 years old. Premature puberty is related to environmental hormone pollutants, foods containing hormones, and social psychological factors. It is recommended to communicate more with your child and consult a psychologist if necessary.