Central precocious puberty (CPP) is a rare condition in which the body matures soon than is usually considered normal. Girls are normally expected to start reaching puberty at around age 7 1/2, and boys at around age 9. 

CPP is caused by early release of the gonadotropin-releasing hormone (GnRH). GnRH tells the pituitary gland to release gonadotropins, which starts sexual development. This may be triggered by a family history of the condition, a rare genetic disorder, a noncancerous tumor in the brain or pituitary gland, brain injury, brain infection (such as meningitis), and radiation or chemotherapy. 

Symptoms of CPP are the usual changes you may expect to see in maturing teen or preteen children, such as hair in the underarms or genital region, acne, body odor, sexual development, emotional changes, and mood swings. 

CPP treatment often involves physicians looking for the underlying cause and treating this. However, medication to block sex hormones and prevent further development may also be prescribed. Gonadotropin-releasing hormones may also be prescribed.