If an 11-year-old boy exhibits precocious puberty, it typically manifests as increased testicular volume and thickening of the penis, along with the development of pubic and axillary hair. In more severe cases, there may also be the growth of facial hair, voice changes, and the appearance of an Adam's apple, among other signs of male sexual organ development. In cases of very advanced precocious puberty, such as full maturity, nocturnal emissions may also occur. If we consider that an 11-year-old boy is exhibiting early signs of puberty, we can take him to the hospital for bone age and gonadal ultrasound examinations. Based on the initial diagnosis, if sexual development is deemed premature and the symptoms are pronounced, further tests such as blood hormone levels can be conducted. With assistance from diagnostic aids like bone age, gonadal ultrasound, and hormone levels, a doctor can guide appropriate intervention treatments to prevent issues associated with precocious puberty, such as significantly shorter adult stature.