Understanding PMS mood swings

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Published 22 May 2025 | Written by Dr Bruce B. Lanier

If you've ever found yourself crying over a commercial or feeling unusually irritable before your period, you're not alone. These emotional ups and downs are commonly linked to Premenstrual Syndrome (PMS) — a group of physical, emotional, and behavioral symptoms that many women experience in the days leading up to their menstrual cycle. Among the most frustrating? Mood swings.

Understanding PMS mood swings isn't just about knowing what’s happening in your body — it's about learning to track, manage, and honor your emotions with compassion. Let’s dive into what causes them, how they show up, and most importantly, what you can do to feel more balanced and supported.


What Are PMS Mood Swings?

PMS mood swings are rapid or unexpected changes in emotion that occur typically 1-2 weeks before your period begins. You may feel cheerful one moment, then overwhelmed, irritable, or anxious the next. These shifts are often intense, and they may affect your relationships, work, and overall sense of well-being.


What Causes PMS Mood Swings?

The exact cause of PMS is still being studied, but hormonal fluctuations are the most likely culprits. Here’s what’s happening:

  • Estrogen and progesterone levels change during the menstrual cycle. These hormones influence serotonin, a brain chemical that helps regulate mood, sleep, and appetite.

  • When estrogen drops, serotonin can also dip, leading to moodiness, irritability, anxiety, and even sadness.

  • These changes don’t affect everyone the same way. Some may have mild symptoms, while others might experience Premenstrual Dysphoric Disorder (PMDD) — a more severe form of PMS.


Common PMS-Related Mood Symptoms

Every woman is different, but here are some of the most frequently reported emotional symptoms associated with PMS:

  • Irritability or anger over small things

  • Crying spells or feeling unusually emotional

  • Anxiety or nervousness

  • Sadness or mild depression

  • Moodiness or being easily overwhelmed

  • Fatigue and difficulty concentrating


How to Track Your PMS Mood Swings

Understanding your cycle is the first step toward managing PMS mood swings. Here’s how to start:

1. Use a Period Tracking App

Apps like Clue, Flo, or My Calendar let you track your period and log emotional symptoms. Over time, patterns become clear.

2. Journal Your Emotions

Each day, jot down how you’re feeling and any stressors. This can help you pinpoint triggers and notice recurring phases.

3. Note the Phases of Your Cycle

Mood swings often peak during the luteal phase (about 10–14 days before your period). When you know it’s coming, you can plan self-care accordingly.


Body Love & Self-Care Tips to Manage PMS Mood Swings

🌿 1. Embrace Gentle Movement

Activities like yoga, stretching, or walking can boost endorphins (happy hormones) and reduce emotional tension.

🥗 2. Eat with Intention

Eat whole foods rich in magnesium, omega-3s, and complex carbs — all of which support mood regulation.

😴 3. Prioritize Rest

Sleep is essential. Lack of rest amplifies emotional sensitivity and irritability.

💖 4. Be Kind to Yourself

Talk to yourself like you would a friend. Remind yourself: “It’s okay to feel this way. This too shall pass.”

🧘 5. Practice Mindfulness or Meditation

Breathing exercises, meditation, or mindfulness apps can help you stay grounded when emotions surge.

🫂 6. Communicate with Loved Ones

Let friends, family, or your partner know when you’re feeling off. A little understanding goes a long way.


When to Seek Support

If your PMS mood swings are severe, interfere with daily life, or lead to thoughts of self-harm, it’s important to talk to a healthcare provider. You may be experiencing PMDD, which is treatable with therapy, lifestyle changes, or medications.


Final Thoughts

PMS mood swings are real, valid, and nothing to be ashamed of. The more you tune into your body and emotions, the better you’ll be able to ride the waves with grace and self-awareness. Tracking your cycle isn’t just about predicting your period — it’s a powerful tool for nurturing your mental and emotional health.

So the next time you feel a mood shift coming on, take a breath, be gentle with yourself, and remember — you’ve got this. 💪✨


Tip: Love your body in every phase. Cycle tracking is self-care. ❤️