Discuss whether the breast development of a nine-year-old girl is a sign of precocious puberty and provide relevant information about adolescent development.

Discuss whether the growth of pubic hair in an 11-year-old boy is a sign of precocious puberty and provide advice on normal development.

15-year-old children are going through adolescence and may require medication and psychological counseling for help.

Long-term or frequent masturbation may have health implications, including mental stress, sexual dysfunction, and fertility issues. It is recommended to quit the habit of masturbation and improve by enriching daily life and reducing alone time.

Multiple red bumps have appeared on the scalp, refusing to go away and causing red and white material to be squeezed out. It is advisable to seek medical advice and avoid self-treatment.

Children with precocious puberty start releasing sex hormones prematurely, which may lead to accelerated bone age and reduced growth space. It is recommended to seek professional medical advice.

The main impact of precocious puberty on children is limited growth in height, along with potential risks of psychological and sexual abuse.

Inquiring about the possibility of a girl getting pregnant after having sex with a boy born in 2007 and a girl born in 2005.

Understanding the developmental characteristics of boys during adolescence, including voice changes, sexual development, and growth rate.

If a girl shows signs of secondary sexual characteristics before the age of 8 or a boy starts sexual development before the age of 10, it may be a sign of precocious puberty. Generally, hospitalization is not required. As a parent, you should pay attention to your child’s diet and avoid feeding them high-calorie and hormone-rich foods. If your child is already 16 years old, this may no longer fall under the category of precocious puberty.