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Anxiety

By OpenAccess Editorial Team 6 min read·Medically reviewed by Dr. Ashwani Dhar, MD · Reviewed June 2026

In short

Anxiety is the body's natural alarm response to perceived threat. It is normal in small doses; it becomes a concern when worry is persistent, out of proportion, and interferes with daily life (NIMH).

Anxiety is the body's built-in alarm system — useful in small doses, but draining when it stays switched on. Everyone feels anxious sometimes. It becomes worth attention when worry is persistent, feels out of proportion to the situation, and starts interfering with daily life. The National Institute of Mental Health estimates that about a third of U.S. adolescents and adults experience an anxiety disorder at some point in their lives.

What anxiety actually is

Anxiety shows up in three places at once: the body (a racing heart, muscle tension, a churning stomach), the mind (worry, anticipating the worst, difficulty concentrating), and behavior (avoiding the things that trigger it).

Avoidance is the part that quietly keeps anxiety going. Steering clear of a feared situation brings relief in the moment, but according to NIMH the anxiety usually returns and can grow, because you never get the chance to learn that you could handle it.

What helps

Anxiety disorders are among the most treatable mental health conditions. Cognitive behavioral therapy (CBT) is the most studied talk therapy for anxiety; acceptance and commitment therapy (ACT) also has growing evidence. For some people a healthcare provider may recommend medication, on its own or alongside therapy.

Everyday habits matter too. NIMH notes that exercise, mindfulness, and meditation can reduce anxiety symptoms and improve the effects of therapy. They are not a replacement for professional care when anxiety is severe, but they are a reasonable place to start.

A technique to try: box breathing

Box breathing is a simple paced-breathing exercise. According to Cleveland Clinic, slow, deliberate breathing helps activate the parasympathetic nervous system — the body's "rest and digest" mode — which counters the fight-or-flight response that anxiety switches on.

Breathe in through your nose for a count of four, hold for four, breathe out through your mouth for four, hold for four, and repeat for a few rounds. If four counts feels long, start with two or three. Stop if you feel lightheaded.

How anxiety connects

Excessive worryis a symptom ofPanic attacksis a symptom ofRuminationis a symptom ofDepressionis related toStressis related toSleep Problemsis related toCognitive behavioral therapycan be helped byBox breathingcan be helped byMindfulnesscan be helped by988 Suicide & Crisis Lifelinecrisis support forAnxiety
How Anxiety connects: Excessive worry (is a symptom of), Panic attacks (is a symptom of), Rumination (is a symptom of), Depression (is related to), Stress (is related to), Sleep Problems (is related to), Cognitive behavioral therapy (can be helped by), Box breathing (can be helped by), Mindfulness (can be helped by), 988 Suicide & Crisis Lifeline (crisis support for).
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Key points

  • Anxiety is normal; it becomes a concern when it is persistent and interferes with daily life.
  • Avoidance relieves anxiety briefly but tends to maintain it over time.
  • CBT and ACT are effective; exercise and mindfulness can help alongside them.
  • Paced breathing (e.g. box breathing) can calm the body's stress response in the moment.

When to seek help

If anxiety has interfered with work, school, or relationships for several weeks, talk with a healthcare provider. If you are having thoughts of harming yourself, call or text 988 (Suicide & Crisis Lifeline) in the U.S., available 24/7.

Frequently asked questions

What is anxiety?

Anxiety is the body's natural alarm response to perceived threat. It is normal in small doses; it becomes a concern when worry is persistent, out of proportion, and interferes with daily life (NIMH).

How common are anxiety disorders?

NIMH estimates that about a third of U.S. adolescents and adults experience an anxiety disorder at some point in their lives.

What helps with anxiety?

Cognitive behavioral therapy (CBT) is the most studied treatment; acceptance and commitment therapy (ACT) also helps. Exercise, mindfulness, and paced breathing such as box breathing can reduce symptoms (NIMH; Cleveland Clinic).

References

  1. 1. NIMHAnxiety Disorders
  2. 2. NIMHGeneralized Anxiety Disorder: What You Need to Know
  3. 3. Cleveland ClinicHow Box Breathing Can Help You De-Stress

Further reading

This article is for education and general wellness only. It is not medical advice, diagnosis, or treatment, and does not replace care from a qualified professional. If you are in crisis, call or text 988 (U.S.), or call 911.