07/02/2025 1:18 p.m.

How Hormones During Puberty Affect Mood and Behavior

Holly Grigg-Spall Author
our emotional world

Hormones during puberty

Puberty is a transformative stage of development in a girl’s life, bringing not only physical changes but also intense emotional shifts. What may seem like unexplained sadness, irritability, insecurity, or sudden mood swings often has a clear biological explanation – the powerful effects of hormones on the brain and body.

nervous system

What happens to hormones during puberty?

When puberty begins, a girl’s body starts producing increased levels of sex hormones, especially estrogen and progesterone. These hormones are crucial for breast development, menstrual cycle regulation, and reproductive system changes. However, their influence goes far beyond the physical. Hormones strongly affect the central nervous system, particularly the parts of the brain responsible for emotions, motivation, self-image, and social interaction.

Why are emotions so intense during puberty?

During puberty, the brain undergoes significant reorganization, especially within the limbic system, which processes emotions. At the same time, the prefrontal cortex – the area responsible for logical thinking and self-control – is still developing. As a result, emotions are felt more intensely, less filtered, and often expressed impulsively.

Sudden hormone spikes can lead to powerful emotional responses – such as anger, tears, excitement, or sadness – sometimes all within the same day. These mood swings are not an exaggeration but a natural response to the biochemical processes happening in the body.

Cycle-related mood changes

The menstrual cycle has a direct impact on emotions and energy levels:

  • Follicular phase (after menstruation): Rising estrogen levels bring increased energy, confidence, creativity, and social engagement.
  • Ovulation: Hormones peak, leading to heightened mood, restlessness, and impulsivity. Romantic feelings and social interest often increase.
  • Luteal phase (after ovulation): Progesterone rises and can fluctuate, often leading to PMS-like symptoms such as irritability, sadness, withdrawal, or mood swings.
  • Menstruation: As hormones drop sharply, girls may feel tired, emotionally sensitive, and more withdrawn, with a greater need for rest.

Hormonal maturity takes time

A teenager’s hormonal balance is far from stable. Hormone levels shift not just weekly but daily, which is why emotions can feel unpredictable. A mood that feels overwhelming today may be gone tomorrow. This emotional rollercoaster is a normal and essential part of adolescence.

Sleep and hormones – a critical connection

Puberty also affects the release of melatonin, the sleep hormone. Its delayed release makes teens want to fall asleep later, while early school schedules force them to wake up sooner. This chronic sleep deprivation can worsen mood swings, increase irritability, and reduce focus. Tiredness, emotional overreactions, and concentration problems often stem from sleep-hormone imbalances during puberty.

Now Is the Time to Get Prepared

How Teena Helps Young Girls (and Their Parents!) Manage Mood Swings During Puberty

With Teena, adolescents can feel confident, informed, and empowered. The app helps them to:

  • Receive real-time data and feedback about their menstrual cycle and current phase – know exactly when ovulation occurs, when the luteal phase begins, and when to expect their next period.
  • Get daily positive affirmations and mood boosters tailored to each phase of the menstrual cycle.
  • Track their moods with a positive, encouraging perspective – we’ve carefully chosen supportive language to help girls understand mood swings during puberty without judgment.
  • Read informative, age-appropriate articles that explain the changes happening in their bodies and brains during puberty.
Your Daily Companion

Your Daily Companion

How Teena Helps You Understand Your Emotions

  • Track your feelings daily: With Teena, you can log how you feel every day – whether sad, angry, happy, tired, or full of energy. The app identifies patterns in your emotions, connects them to your cycle phases, and explains why you feel the way you do.
  • Understand mood swings: Teena helps you recognize when hormonal changes are influencing your mood – for example, before your period or during ovulation.
  • Get to know yourself better: When you understand that your emotions are often hormonally driven, it becomes easier to handle them calmly.
  • Discover emotional cycles: You’ll see when you need rest and when you’re naturally more confident or creative.

Teena makes your emotions visible without judgment. It strengthens your self-confidence, helps you practice mindfulness, and reminds you that you’re not alone in experiencing mood swings – it’s all part of your natural cycle.

FAQs

Is it helpful to plan my daily life around my cycle?

Yes – absolutely. Living in sync with your cycle means understanding and respecting the strengths and needs of each phase. With Teena, you’ll learn when your body needs rest, when you’re at your most productive, and when your creative energy is flowing. This helps you make mindful decisions – for better balance, well-being, and self-care.

Why does my mood change throughout my cycle?

The hormonal fluctuations of estrogen, progesterone, FSH, and LH during your cycle affect not only your body but also your emotional state. Many women notice symptoms like irritability, sadness, fatigue, or withdrawal before their period (during the luteal phase). These reactions are biologically driven – they are not a sign of weakness but rather a reflection of a sensitive and finely tuned system.

How can Teena help me better understand my mood?

Teena is more than just a period tracker – the app analyzes your daily mood entries, physical symptoms, and cycle phases. This allows you to identify recurring patterns, plan your daily life accordingly, and understand why you feel the way you do during certain phases. In addition, Teena provides daily affirmations and positive reminders tailored to your cycle phase, helping you stay motivated, balanced, and emotionally supported every day. The result is greater self-awareness, emotional clarity, and a more positive outlook on your natural cycle.

Learn more

Those who understand their cycle can intentionally align nutrition, mood, and fitness with hormonal changes to their advantage.

Irregular cycles, heavy bleeding, or mood swings – find out what’s normal when it comes to your period during puberty.

Learn how to recognize the first signs of an approaching period. This guide explains the signs, preparation, and support related to the first menstruation.