Male Puberty Starts Sooner Than You Think

Modern male puberty starts sooner than you think. 

Boys today may enter puberty as early as age nine. That’s why your 10-year-old’s mood swings might actually be linked to these new hormonal shifts. As Cara Natterson and Vanessa Kroll Bennett point out in their book, This Is So Awkward: Modern Puberty Explained, the first sign of puberty often comes with a slamming door.

Why Parents Miss the First Signs

Many parents aren’t ready for male puberty. Early physical changes can be subtle, and they usually appear just as boys begin seeking more privacy. According to Vanessa, it’s entirely possible you won’t notice the initial stages of puberty until your son’s behavior shifts dramatically.

When Your 10-Year-Old Acts More Like a Teen

Puberty hormones—mainly testosterone—don’t just change bodies; they shape moods, too. Sudden spikes are associated with outbursts and that well-known “swing to silence” so many adolescent boys display. Pediatrician Cara Natterson explains these hormone surges can escalate and crash within hours, and that emotional roller coaster is often what you see when your son acts like “a jerk.”

They Dislike the Swings, Too

Kids don’t enjoy these wild ups and downs any more than you do. Their brains are awash in hormones they don’t yet know how to handle, causing confusion and moodiness. In addition, boys’ emotional regulation skills aren’t fully developed, which is why parents, teachers, and other adults need to show empathy while holding them accountable.

Offer Room to Recover

“We have to give boys the benefit of the doubt,” Vanessa advises, emphasizing that many feel ashamed after a blow-up. By giving them space to cool off, then reconnecting later, you let them know there’s a path to re-enter the conversation without judgment.

Weathering the Adolescent Storm

It’s normal to feel grief, fear, and frustration as your son navigates puberty. Boys often distance themselves from parents during this time, which can feel like rejection. Don’t forget they usually “come back” after they’ve crossed the threshold into more mature adolescence.

A Messy Yet Meaningful Journey

Yes, your son might seem smelly, messy, or downright disrespectful right now—none of which means he’ll stay that way, or that you’ve parented poorly. As Vanessa says, guiding boys toward kindness, empathy, and thoughtfulness is a winding road filled with bumps.

Respond, Don’t React

When tempers flare, remain calm. Give your son the space he needs, and circle back once he’s cooled down. Teach him about emotions in those quieter moments and seek additional help if needed. By walking alongside him, you’ll both be better prepared to handle the challenges—and rewards—of growing up.

Links we mentioned (or should have) in this episode:

This is So Awkward: Modern Puberty Explained, by Cara Natterson, MD & Vanessa Kroll Bennett

lessawkward.com — Cara & Vanessa’s website (includes links to their books, newsletter, podcast, & talks)

The Puberty Podcast — Cara & Vanessa’s podcast (Don’t miss Jen on their podcast — Building Boys with Jennifer Fink)

Decoding Boys w Dr. Cara Natterson –– ON BOYS episode

The Truth About Parenting Teen Boys — the famous BuildingBoys post about 14-yr-old boys being a**holes

Puberty, Perimenopause, & Midlife Parenting — ON BOYS episode

Guy Stuff: The Body Book for Boys, by Cara Natterson

Guy Stuff Feelings: Everything You Need to Know About Your Emotions, by Cara Natterson

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