06/26/2025
🧠 What Fight or Flight Does to Your Nervous System
The fight or flight response is part of your sympathetic nervous system — it's your body’s emergency alarm system. It’s meant to protect you from danger, but when you're stuck in it all the time (due to trauma, stress, etc.), it overworks your mind and body.
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💡 1. It Activates Survival Mode
Your brain thinks you’re in danger (even if it's emotional, not physical).
The amygdala (fear center in your brain) goes on high alert.
It sends a signal to your hypothalamus to activate the autonomic nervous system.
Then your adrenal glands flood your body with stress hormones like:
Adrenaline – makes you ready to fight or run
Cortisol – keeps you alert, but too much causes burnout
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⚡ 2. It Shuts Down "Non-Essential" Functions
To help you survive, your body turns off or slows down things it thinks you don’t need:
Digestion (which is why your stomach hurts or you lose appetite)
Immune system (you get sick easier)
Reproductive system (can mess with periods or libido)
Clear thinking (hard to concentrate or make decisions)
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💔 3. It Makes You Feel Unsafe in Safe Places
When this system is always on (especially if you’ve had trauma), your body:
Overreacts to small stress
Can't tell the difference between a real threat and a memory
Keeps you in a loop of anxiety, panic, or shutting down
Feels like you're constantly on edge, waiting for the worst
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😫 4. It Can Cause Dysregulation (Long-Term Effects)
If you stay in fight or flight too long:
Nervous system can’t relax into parasympathetic (rest + heal) mode
You might get stuck in:
Fight (anger, control, rage)
Flight (avoidance, anxiety, overworking)
Freeze (numbness, shutdown, dissociation)
Fawn (people-pleasing to stay safe)
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💗 What You Really Need:
To move out of this state, your nervous system needs to feel:
Safe
Seen
Soothed
Supported
These are known as the 4 S's of nervous system healing.
💥 COMMON TRIGGERS OF FIGHT OR FLIGHT MODE (SYMPATHETIC RESPONSE):
🧠 Mental/Emotional Triggers:
Past trauma (especially unhealed childhood trauma)
Fear of abandonment or rejection
Feeling judged, shamed, or criticized
High-pressure situations (deadlines, performance anxiety)
Conflict or arguments
Lack of control or unpredictability
Emotional neglect or invalidation
Gaslighting or manipulation
🔊 Sensory Triggers:
Loud noises (sirens, yelling, fireworks)
Sudden movements or being startled
Bright lights or flashing images
Crowded or overstimulating environments
👃 Body/Physical Triggers:
Low blood sugar (feeling hangry)
Exhaustion or lack of sleep
Caffeine, sugar, or alcohol overload
Chronic pain or inflammation
Hormonal shifts (like PMS or adrenal fatigue)
Being too hot or too cold
😥 Relational Triggers:
Lack of safety in relationships
Disrespect, betrayal, or dishonesty
Inconsistent communication
Feeling ignored or dismissed
Hypervigilance from past emotional wounds
🌍 Environmental Triggers:
Unsafe living situations
Financial stress or job insecurity
Lack of support system
Sudden changes in environment or routine
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⚠️ SIGNS YOU’RE IN FLIGHT OR FIGHT MODE:
Racing heart
Shallow breathing or holding breath
Sweaty palms
Clenched jaw or fists
Irritability, panic, or anxiety
Wanting to run, escape, lash out, or shut down
Jeannine Lamb Jara