The sex hormones, including testosterone, cause sexual maturation in boys. Sex hormones accelerate growth and also control the skeletal process that ends growth. Boys who start puberty prematurely are tall for their age, but growth stops earlier for them. Their full height potential as adults is never achieved. They often grow no taller than 60 to 65 inches.
Behavioral changes occur during premature puberty.
Some boys become more aggressive than their peers and develop a sex drive. They may become too self-conscious with their physical changes to undress in front of others, including parents. Boys often have a hard time paying attention in school and getting along with other children their age. They may feel more comfortable around older children, but are not mature enough emotionally to be accepted by them. This condition requires medical treatment.