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Sudden waves of intense fear

Also called: Panic attack, panic disorder

Sudden waves of intense fear with a racing heart, shortness of breath, shaking, or feeling like you're dying are panic attacks. They usually peak within 10 minutes and pass. Repeated attacks may be panic disorder, which is very treatable. Chest pain that might be a heart attack should still be checked.

Common causesPanic disorder, anxiety, stress, caffeine, thyroid
Usually serious?Not dangerous, but frightening
Get checked ifRepeated attacks or chest pain
If you think it's an emergency, call 911.Thinking about suicide or in crisis? Call or text 988.Being hurt or threatened at home? National Domestic Violence Hotline: 1-800-799-7233.Help with alcohol or drug use: SAMHSA Helpline, 1-800-662-4357.

Overview

Panic attacks cause sudden fear with physical symptoms: pounding heart, sweating, trembling, shortness of breath, chest discomfort, dizziness, numbness, and feeling unreal.

Panic disorder means repeated unexpected attacks and worry about having more. Stress, caffeine, stimulants, alcohol withdrawal, and thyroid problems can trigger attacks.

When to get medical care

Call 911Chest pain, pressure, or shortness of breath that could be a heart problem, especially if it's your first episode or you have heart risks. Thoughts of harming yourself or others: call or text 988, or call 911 if you're in danger.
Get care todayAttacks that are getting more frequent or severe.
See a doctor soonRepeated panic attacks. Avoiding places for fear of attacks.

Causes

Causes include panic disorder, anxiety disorders, stress, trauma, caffeine, stimulants, alcohol or drug withdrawal, and medical conditions like an overactive thyroid or heart rhythm problems.

OwieClear has pages on 3 conditions that can cause sudden waves of intense fear. Each shows how soon to get care.

Common causes

  • Panic attacksSee a doctor if it doesn't get better

    Sudden waves of intense fear that peak within minutes.

  • AgoraphobiaSee a doctor if it doesn't get better

    Fear and avoidance of places where escape or help might be hard, like crowds, public transport, stores, or being outside alone, often because of fear of having…

Less likely causes

What you can do at home

  • Breathe slowly: in for 4, out for 6.
  • Remind yourself it will pass.
  • Limit caffeine and alcohol.
  • Exercise regularly.

Medicines

Cognitive behavioral therapy works well. SSRIs or other medicines can help.

At the doctor

The provider will check for medical causes.

Questions you may be asked

  • What happens during attacks
  • How often
  • Caffeine and substances

The exam

A physical exam.

Tests

  • ECG
  • Thyroid tests

Prevention

Reduce attacks.

  • Manage stress
  • Limit caffeine
  • Get therapy

Check your symptoms

Most symptoms have more than one possible cause. The symptom checker looks at all of your symptoms together, plus your age, and shows how soon to get care.

Start the symptom checker

Sources

Last updated 2026-11-13.