what role do hormones and puberty play in my teen’s behaviour and emotional changes?

Puberty brings dramatic hormonal shifts that directly impact mood, energy, sleep, and behaviour. Understanding the biology helps parents respond with patience and appropriate support.

What is going on?

During puberty, the body experiences a surge in hormones, oestrogen, progesterone, and testosterone, that affect far more than physical development. These hormones directly impact the brain, influencing mood, emotional regulation, sleep patterns, and even cognitive function. For those who menstruate, cyclical hormone changes create predictable (though often intense) mood patterns. The teenage brain is also rewiring itself, with the emotional centres (limbic system) developing faster than the rational centres (prefrontal cortex). This biological reality means teens genuinely experience emotions more intensely than adults, they’re not being dramatic. Understanding this can help parents respond with empathy rather than frustration.

What is normal:

What is not normal (seek support):

• Extreme mood episodes that seem out of proportion to hormonal cycles
• Severe depression or anxiety that doesn’t improve
• Eating disorders or dangerous body image behaviours
• Complete inability to function during certain times
• Self-harm or suicidal thoughts
• Rage or aggression that feels uncontrollable

Your teen’s perspective:

I hate when people say I’m just being hormonal. My feelings are real, even if hormones are affecting them. It helps when my parents understand that I can’t always control my reactions, even when I want to. I don’t want excuses, I want understanding. And honestly, it helps to know that this intense emotional stuff won’t last forever.

How to start the conversation:

• “Your body is going through a lot right now. It makes sense that your feelings are intense.”
• “I know it might feel like your emotions are all over the place. That’s completely normal during these years.”
• “If you’re noticing patterns in how you feel, tracking your cycle might help you understand what’s happening.”
• “Your brain is literally rewiring itself. That’s why everything feels so big right now.”
• “I went through this too, even though it might have looked different. You’re not alone.”

Do:

• Help them track their cycle to identify patterns in mood and energy
• Ensure they’re getting adequate sleep (8-10 hours)
• Support physical activity, which helps regulate hormones and mood
• Provide nutritious food and regular meals

Avoid:

• Dismissing their feelings as “just hormones”
• Using hormones as an excuse to invalidate their experiences
• Expecting them to control emotions perfectly during hormonal surges
• Making jokes about periods or puberty that embarrass them

Watch for:

Track whether mood changes follow predictable patterns related to the menstrual cycle, or whether they’re more random and persistent. Pattern-based mood changes are often hormonal; persistent low mood may indicate something else.

When to seek help:

Seek medical guidance if hormonal symptoms are severe enough to interfere with daily life (this could be PMDD or another condition), if you notice signs of eating disorders related to body changes, or if emotional symptoms persist beyond typical hormonal fluctuations. Your family doctor can assess whether hormonal or mental health support is needed.

In the app:

Ladybird’s cycle and mood tracking features help teens understand the connection between their hormonal cycles and emotions. By logging symptoms daily, they can identify patterns and feel more in control of their changing bodies. This information can also be valuable when speaking with healthcare providers.

Related articles

• how are smartphones and social media changing teen development?
• how can I talk to my teen about getting older, changes in their body, and self-esteem?
• how can I be emotionally available and supportive without enabling my teen?