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Heat Intolerance

Written by Natalie Rivans CSP, CMMT

Published on Apr 04, 2026

Updated on Apr 04, 2026

Updated on Apr 04, 2026

Table of Contents

What is Hypervigilance?

Hypervigilance is a state of heightened alertness where the nervous system is constantly scanning for threats, even in safe situations. You may feel unable to relax, startle easily, notice every sound or movement, struggle to feel safe, or constantly anticipate that something is about to go wrong. It is exhausting, isolating, and often invisible to others.

How to know if Hypervigilance is chronic

  • Present most of the time, including in objectively safe environments
  • Causing significant physical exhaustion from the constant state of alert
  • Accompanied by sleep difficulties, irritability, or difficulty concentrating
  • Persisting for months or years

Hypervigilance can be associated with the following conditions:

How brain training & re-origin can help

Hypervigilance is a state of heightened alertness where the nervous system is constantly scanning for threats, even in safe situations. You may feel unable to relax, startle easily, notice every sound or movement, struggle to feel safe, or constantly anticipate that something is about to go wrong. It is exhausting, isolating, and often invisible to others.

FAQs

Is hypervigilance the same as anxiety?

They overlap significantly. Hypervigilance is more specifically about the constant scanning for danger, while anxiety can manifest in many forms. Hypervigilance is a core feature of PTSD and trauma responses.

Can hypervigilance cause physical symptoms?

Yes. Chronic hypervigilance keeps the body in a low-grade fight-or-flight state, contributing to fatigue, muscle tension, headaches, digestive issues, and immune dysregulation.

Can the brain learn to feel safe again?

Yes — this is precisely what nervous-system-focused brain retraining aims to achieve. Teaching the brain that the environment is safe is a learnable, neuroplastic process.

Is hypervigilance a sign of trauma?

Often, yes. But it can also develop through prolonged stress, chronic illness, or any experience that conditions the brain to remain on high alert. Take the Trauma Response quiz at re-origin.com/trauma-response-quiz.

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