Causes of true precocious puberty 1. organic lesions of the central nervous system; 2. peripheral precocious puberty transformed by 3. Idiopathic cPP (IcPP) without organic lesions, about 80%-90% of female children are IcPP and more than 80% of male children are organic. The development of precocious puberty can only be controlled by treating the original disease, so parents must go to a regular hospital to clarify the cause if they find that their child is developing. The causes of peripheral precocious puberty in females 1. homosexual precocious puberty (second sex characteristics of girls) hereditary ovarian abnormalities such as McCune-Albright syndrome, benign ovarian occupational lesions such as autonomic ovarian cysts, estrogen-secreting adrenocortical tumors or ovarian tumors, ectopic human chorionic gonadotropin (HCG) secreting tumors, exogenous estrogen intake; 2. heterosexual precocious puberty (secondary male sex characteristics) congenital adrenocortical hyperplasia, androgen-secreting adrenocortical tumors or ovarian tumors, and exogenous androgen intake. Peripheral precocious puberty in males 1. Homosexual precocious puberty (male secondary sex characteristics) Congenital adrenocortical hyperplasia (more common), adrenocortical tumors or testicular mesenchymal cell tumors, ectopic HCG-secreting tumors, exogenous androgen intake. 2. Heterosexual precocious puberty (female secondary sex characteristics): estrogen-producing adrenocortical tumors or testicular tumors, ectopic HCG-secreting tumors, and exogenous estrogen intake.