Hypervigilance is a state of heightened alertness accompanied by behavior that aims to prevent danger. It is commonly associated with conditions, such as PTSD. Symptoms can include rapid breathing, dilated pupils, and a constant need to check surroundings.

People may mistake hypervigilance for paranoia, as a person experiencing hypervigilance may exhibit some behavior that seems paranoid. However, there are differences between these conditions.

Understanding hypervigilance can enable people to access the right sort of help and better manage their symptoms. This article explores the symptoms, causes, and treatments for hypervigilance.

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Having their senses on high alert means that people with hypervigilance often feel there is a threat close by.

People experiencing hypervigilance are unusually sensitive to the environment and people around them.

It is not a condition in itself, but a way of behaving that may be caused by trauma or an underlying mental health problem.

When someone experiences hypervigilance, their subconscious is constantly anticipating danger. As a result, their senses are on high alert, ready to spot and respond to any danger.

The situations they are trying to spot might be:

  • a physical danger
  • a repeat of a traumatic event
  • something wrong in a relationship

This super alertness makes people with hypervigilance feel and act as though there is always a threat around the corner.

Normally, they are not responding to a real threat. Rather, their brain is overanalyzing, and overreacting to, input from their senses.

Hypervigilance can be a symptom of:

Hypervigilance vs. paranoia

The way people behave when they are experiencing hypervigilance can seem similar to paranoia. However, there are important differences between the two mental states:

  • Delusion vs. being on guard: In paranoia, people hold specific, untrue beliefs that certain people or things are out to get them. People experiencing hypervigilance do not have any fixed beliefs about a specific thing happening, however. They are not delusional but just on high alert.
  • Now vs. in the future: In paranoia, people have a delusional belief that someone or something is trying to harm them now, in the present. In hypervigilance, people are on guard in anticipation of something bad happening in the future.
  • Lack of awareness vs. insight: In paranoia, people will not be aware that they are suffering from an illness and may believe that their delusions are true. In hypervigilance, people often have an awareness that there is no objective reason to be on edge, but find it hard to relax nonetheless.

There are some physical symptoms of hypervigilance, but most symptoms are behavioral. The physical signs and behaviors that people experiencing hypervigilance may show are explored below.

Physical symptoms

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Some physical symptoms of hypervigilance include sweating, quick breathing, and dilated pupils.

Not everyone experiencing hypervigilance shows physical signs, but some do.

When people do show physical symptoms, they may include:

  • dilated pupils
  • breathing very quickly
  • seeming restless
  • sweating
  • having a rapid heart beat

Behavioral symptoms

The way a person behaves when they are experiencing hypervigilance can vary. However, there are some common types of behavior that often occur.

People experiencing hypervigilance may:

  • keep checking their surroundings and find it hard to focus on conversations
  • be easily startled and jump or scream at things they hear or see suddenly
  • overreact to things happening around them in a way that may seem hostile
  • find crowded or noisy environments overwhelming
  • look closely at people to see if they are holding weapons
  • overanalyze situations and believe them to be worse than they are
  • overestimate the chances of a bad thing happening to them physically or in their relationships
  • be overly sensitive to people’s tone or expressions, taking them personally
  • have trouble getting to sleep or staying asleep


Due to the way hypervigilance may cause people to behave, there can be some long-term complications. These include:

  • obsessive behavior patterns
  • physical and mental exhaustion
  • difficulty in relationships
  • problems in the workplace
  • avoidance of social situations

Hypervigilance is the brain’s way of protecting the body from danger. As such, people fighting in the military or experiencing violence at home may exhibit hypervigilance with good reason.

However, hypervigilance can also happen when there is not a real, physical danger. When this happens, it is as a result of a mental health condition.

Mental health conditions that can cause hypervigilance include:


PTSD is an anxiety disorder that people can develop after experiencing or seeing a traumatic or life-threatening event. Events that can cause PTSD include:

  • military combat
  • death of a loved one
  • sexual assault
  • serious accidents
  • prolonged bullying

Hypervigilance is a key feature of PTSD, as people are in fear of re-living the trauma. This can cause them to be constantly on-guard, in anticipation of the trauma happening again.


People diagnosed with generalized anxiety disorder (GAD) or social anxiety may experience hypervigilance. This is most likely to happen in new situations or when they meet new people.

However, there is some debate as to whether anxiety causes hypervigilance, or whether anxiety disorders result from hypervigilant behavior. A 2009 study, conducted on rats, found that a hypervigilant state made them more vulnerable to anxiety.

More research is needed to understand whether hypervigilance is a symptom or a cause of anxiety disorders.

Other mental health conditions

Hypervigilance may also occur in people with other mental health conditions. These may include:


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Hypervigilant behavior may be triggered by crowded environments, uncertain situations, and feelings of claustrophobia.

There are common triggers that can bring on hypervigilant behavior in those who are affected by it. These triggers include:

  • feeling claustrophobic
  • crowded environments
  • uncertain situations
  • reminders of past trauma
  • arguments and shouting
  • criticism or embarrassment
  • competing demands or expectations
  • chaotic behavior by others
  • feeling as if they have been abandoned
  • feeling or anticipating pain
  • being emotionally distressed

The first step in treatment if a person experiences hypervigilance due to domestic violence or military combat, is to remove them from the dangerous environment.

When someone experiences hypervigilance due to a mental health condition, other treatments that may help include:

  • Therapy: A doctor may refer people for therapy to help treat the mental health condition that is causing their hypervigilance. Therapies that may help include cognitive behavioral therapy (CBT) for anxiety or exposure therapy for PTSD.
  • Medication: Anxiety and PTSD can be treated with beta-blockers, antidepressant, or anti-anxiety medication. Schizophrenia or bipolar may be treated with antipsychotics.

Management techniques

As well as taking medication if it is prescribed and attending therapy if they have been referred, people may look for other ways to manage hypervigilance.

The following techniques are among those that can help:

  • Relaxation: Deep breathing exercises or yoga may aid relaxation and help reduce anxiety so that people can better manage their symptoms.
  • Exercise: Regular will release endorphins, which may help reduce anxiety.
  • Mindfulness: Being mindful of how they are feeling and focusing on the moment may help people monitor and reduce their hypervigilant behavior.
  • Communication: Expressing how they are feeling to others and being willing to accept feedback about times they may have overreacted can be helpful.
  • Objectivity: Looking for objective evidence, as to whether there is a need to be so on guard, may help people monitor their hypervigilant behavior.