The appearance of pubic hair on an 8-year-old girl is not normal. The appearance of pubic hair in 8-year-old girls indicates that secondary sexual characteristics have appeared and entered puberty. It is mainly due to the emergence of sex hormones stimulated by growth and development. However, since under normal circumstances, girls should appear at the age of 12 to 14 years old, after the development of breasts. Therefore, the appearance of pubic hair in 8-year-old girls is an abnormal phenomenon, which belongs to precocious puberty. Precocious puberty may be caused by early activation of the hypothalamic-pituitary-gonadal axis function or non-controlled hypothalamic-pituitary-gonadal axis function but with elevated levels of sex hormones. Precocious puberty can affect the physical development of children, and it is recommended to consult a doctor for treatment. At the same time, pay attention to the child’s diet, avoid eating too high calorie or hormone-containing food, should be supplemented with proteins, eat more fresh vegetables and fruits to increase the nutritional intake.