Signs Your Nervous System Is Stuck in Fight or Flight

By Lorissa Brunk, LPC | Licensed Therapist & SSP Facilitator | The Well Sessions

Most people think of fight or flight as something that happens during a crisis. A car accident. A confrontation. A moment of real danger.

But for a lot of the people I work with, fight or flight isn't a moment. It's a baseline.

It's the hum underneath everything — the low-grade vigilance that never fully turns off, even on a quiet Sunday morning with nowhere to be and nothing to do. It's the body that won't unclench. The mind that won't stop running the numbers. The exhaustion that sleep doesn't fix.

If that sounds familiar, your nervous system may be stuck in a chronic state of sympathetic activation — and it has been for so long that it just feels like who you are.

It isn't. And it doesn't have to stay that way.

Here are the signs I look for — and what they're actually telling us about what's happening beneath the surface.

1. You Feel Anxious Even When Nothing Is Wrong

This is one of the most disorienting experiences my clients describe — looking around at their life, seeing that things are objectively okay, and still feeling a persistent, low-level dread they can't explain or shake.

When the autonomic nervous system is chronically activated, it doesn't wait for an actual threat to sound the alarm. It stays ready. All the time. The body is doing its job — scanning, bracing, preparing — it just can't tell the difference between real danger and the absence of it.

This isn't anxiety as a personality trait. This is a nervous system that never received the signal that the threat has passed.

2. Your Body Is Tense Even When You're "Relaxed"

Tight jaw. Raised shoulders. Shallow breathing. A chest that feels slightly compressed. A stomach that's never quite settled.

Most people living in chronic fight or flight carry significant physical tension they've stopped noticing — because it's been there so long it's become invisible. They only realize how tense they were when something finally shifts and they feel the contrast.

Your body keeps a running record of your nervous system's state. Chronic muscle tension, jaw clenching, shallow breathing, and digestive issues are all ways the body expresses what the mind has learned to normalize.

3. You Wake Up Already Wired

You haven't checked your phone. You haven't looked at your calendar. Nothing has happened yet — and your nervous system is already braced.

Cortisol, your primary stress hormone, naturally peaks in the early morning to help you wake up. But in a chronically dysregulated nervous system, that morning cortisol spike is exaggerated — and the body wakes up in a state of low-level alarm before the day has even begun.

If you regularly wake up feeling tense, anxious, or already behind before you've gotten out of bed, this is your nervous system — not your morning routine — that needs attention.

4. Sounds, Crowds, or Stimulation Leave You Depleted

Loud restaurants feel unbearable. Background noise makes it impossible to concentrate. After social events — even enjoyable ones — you need hours, sometimes a full day, to recover. You avoid certain environments entirely because you know how they'll cost you.

This is not simply introversion. This is a nervous system whose threat-detection system is calibrated too high — reading ordinary sensory input as potential danger and burning through enormous resources to manage it.

The middle ear, which processes sound, is directly connected to the autonomic nervous system. When the nervous system is stuck in fight or flight, it prioritizes detecting low-frequency sounds associated with threat over the mid-range frequencies associated with human connection and safety. This is part of why SSP — which retrains the auditory pathway — can be so transformative for people who experience this kind of overwhelm.

5. You're Always Scanning for What Could Go Wrong

You replay conversations after they happen. You anticipate problems before they exist. You prepare for worst-case scenarios as a matter of routine. You find it genuinely difficult to be present because some part of your mind is always working the threat-detection beat.

Hypervigilance is one of the most common — and most exhausting — expressions of a nervous system stuck in sympathetic activation. It often develops as a very intelligent adaptation to an environment where staying alert kept you safe. The problem is that the nervous system doesn't automatically update when the environment changes. It keeps running the old programming long after the original threat has passed.

This is not a character flaw. This is a protective pattern that deserves compassion — and the right kind of support to help it finally rest.

6. You're Exhausted But Can't Rest

You're tired. Genuinely, deeply tired. And yet sleep is hard. Relaxing feels impossible. Even when you have downtime, your body doesn't know what to do with it. You might describe yourself as "wired but tired" — and that phrase captures something neurologically real.

A nervous system stuck in fight or flight keeps the body in a state of metabolic expenditure. It's running the engine at high revs around the clock — burning through resources, disrupting sleep architecture, preventing the genuine rest and repair that happens in a regulated state. No amount of sleep hygiene will fully fix what a dysregulated nervous system is creating.

7. Connection With Others Feels Draining, Not Restoring

According to Polyvagal Theory, our social engagement system — the part of us designed to connect, attune, and feel safe with other people — operates from the ventral vagal state. When the nervous system is stuck in sympathetic activation, that social engagement system goes offline.

Not because you don't want connection. Not because something is wrong with your relationships. But because your biology is prioritizing protection over belonging.

This shows up as feeling drained after time with people you love. Difficulty feeling truly close even in safe relationships. The sense that you're always performing socially rather than genuinely present. A loneliness that persists even when you're surrounded by others.

8. Your Emotions Swing Fast and Feel Hard to Manage

Fight or flight doesn't just produce anxiety. It produces reactivity. When the nervous system is dysregulated, the window of tolerance — the range within which emotions feel manageable — narrows significantly. Things that might be minor irritants become overwhelming. Frustration escalates quickly. Grief arrives without warning. The emotional landscape feels unpredictable and hard to navigate.

This isn't emotional immaturity. This is what happens when the regulatory capacity of the nervous system is already maxed out — there's simply less capacity available for managing the inevitable fluctuations of daily emotional life.

What This Means — And What to Do About It

If several of these signs resonated, the most important thing I want you to hear is this: this is not who you are. This is what your nervous system learned.

Somewhere along the way — through stress, through early experiences, through a period of sustained threat or instability — your nervous system learned that staying activated was the safest strategy. And it has been faithful to that learning ever since.

The good news is that the nervous system is not fixed. It is neuroplastic — meaning it can learn new patterns, new responses, new baselines. With the right support, a chronically activated nervous system can find its way back to genuine regulation. Not managed. Not suppressed. Actually regulated.

This is the work I do at The Well Sessions.

How I Help

As a licensed therapist and certified SSP facilitator with over 15 years of clinical experience, I work with clients who are ready to address anxiety and nervous system dysregulation at the root — not just the surface.

For clients who've hit a ceiling with traditional talk therapy, I offer the Nervous System Reset — a complete 6-week Safe and Sound Protocol program that works directly through the auditory pathway to signal safety to the autonomic nervous system. It's one of the most powerful bottom-up tools available, and it's rooted in the same Polyvagal Theory research that explains everything you just read.

The Nervous System Reset includes:

• A 60-minute nervous system intake assessment

• The full SSP Core listening protocol, paced to your system

• Weekly check-in sessions throughout the program

• Between-session email support

• A personalized integration plan and closing session

Investment: $500. Virtual sessions available across the United States.

You Don't Have to Keep Living Like This

A nervous system stuck in fight or flight is not a life sentence. It is a pattern. And patterns can change.

If you recognized yourself in this post and you're ready to explore what's possible, I'd love to have a conversation. I offer a free 20-minute call — no pressure, no commitment — to talk about where you are and whether this work might be the right fit.

Book your free 20-minute call →

Lorissa Brunk, LPC is a licensed therapist and certified SSP facilitator based in Colorado, offering virtual therapy and nervous system support to clients across the United States. She specializes in anxiety, trauma, and nervous system regulation through her private practice, The Well Sessions.