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Puberty in boys

Well child - puberty in boys; Development - puberty in boys

Puberty is when your body changes, when you develop from being a boy to a man. Learn what changes to expect so that you feel more prepared.

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Expect Changes with Puberty

Know that you will go through a growth spurt.

You have not grown this much since you were a baby. Usually boys start their growth spurt about 2 years after puberty starts. When you are done going through puberty, you will be almost as tall as you will be when you are a grown up.

Maybe you are worried about how tall you are or how tall you will get. How tall you get depends a lot on how tall your mom and dad are. If they are tall, you are likely to be tall. If they are short, you will probably be short too.

You will also start building some muscle. Again, you may be worried that other boys seem to be getting bigger faster. But puberty happens for each boy on their own body schedule. You cannot rush it.

Eat well, sleep well, and stay physically active to help you grow well. Some boys want to lift weights to build muscles. You will not be able to build muscle until you are in puberty. Before puberty, lifting weights will tone your muscles, but you will not build muscles yet.

Expect Lots of Body Changes

Your body makes hormones to get puberty started. Here are some changes you will start seeing. You will:

You will also get erections more often. An erection is when your penis becomes bigger, hard, and stands out from your body. Erections can happen at any time. This is normal.

Know When Puberty Happens

Most boys start puberty somewhere between the ages of 9 and 16 years. There is a wide age range when puberty starts. That is why some kids in 7th grade still look like young children and others look really grown up.

Girls usually start puberty earlier than boys. That is why so many girls are taller than boys in 7th and 8th grade. As adults, many men end up taller than women.

Accept changes in your body. Try to be comfortable with your body changing. If you are stressed about changes, talk to your parents or a provider that you trust.

When to Call the Doctor

Call your provider if you are:

References

American Academy of Pediatrics, healthychildren.org website. Concerns boys have about puberty. www.healthychildren.org/English/ages-stages/gradeschool/puberty/Pages/Concerns-Boys-Have-About-Puberty.aspx. Updated January 8, 2015. Accessed February 1, 2021.

Garibaldi LR, Chemaitilly W. Physiology of puberty. In: Kliegman RM, St. Geme JW, Blum NJ, Shah SS, Tasker RC, Wilson KM, eds. Nelson Textbook of Pediatrics. 21st ed. Philadelphia, PA: Elsevier; 2020:chap 577.

Styne DM. Physiology and disorders of puberty. In: Melmed S, Anchus RJ, Goldfine AB, Koenig RJ, Rosen CJ, eds. Williams Textbook of Endocrinology. 14th ed. Philadelphia, PA: Elsevier; 2020:chap 26.

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Review Date: 10/2/2020  

Reviewed By: Neil K. Kaneshiro, MD, MHA, Clinical Professor of Pediatrics, University of Washington School of Medicine, Seattle, WA. Also reviewed by David Zieve, MD, MHA, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.

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