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Teen Development


As a teenager, you go through many physical, mental, emotional, and social changes. The biggest change is puberty, the process of becoming sexually mature. It usually happens between ages 10 and 14 for girls and ages 12 and 16 for boys. As your body changes, you may have questions about sexual health.

During this time, you start to develop your own unique personality and opinions. Some changes that you might notice include

  • Increased independence from your parents
  • More concerns about body image and clothes
  • More influence from peers
  • Greater ability to sense right and wrong

All of these changes can sometimes seem overwhelming. Some sadness or moodiness can be normal. But feeling very sad, hopeless, or worthless could be warning signs of a mental health problem. If you need help, talk to your parents, school counselor, or health care provider.

Centers for Disease Control and Prevention


Help is just a phone call away: 800-435-7221
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