Mental health
Why Anxiety Makes Your Heart Race
Anxiety triggers a fight-or-flight surge of adrenaline that speeds your heart to ready your body for action. The racing usually fades as the anxiety settles.
Talk to a clinician
Dr. Marcus Reed, MD — Primary-care physician
Evaluating a racing heart, ruling out thyroid, blood-count, and heart-rhythm causes, and connecting anxiety-driven symptoms to CBT or SSRI treatment. Gale can match you with a licensed clinician for a visit.
Find care →The fight-or-flight response
Your body has an ancient alarm system designed to protect you from danger. When your brain perceives a threat — real or imagined — it activates the sympathetic nervous system and releases adrenaline. Adrenaline raises your heart rate and the force of each beat so blood reaches your muscles quickly, in case you need to run or fight. This happens automatically, before you have time to think it through, which is why a racing heart can appear the instant you feel anxious.
Why it feels so intense
The same adrenaline surge that speeds your heart also widens your airways, tenses your muscles, and sharpens your senses. Together these can make your heartbeat feel like it is pounding in your chest, throat, or ears. Because the sensation is so noticeable, it is easy to worry that something is wrong with your heart, which can add more anxiety and keep the cycle going. Understanding that the racing is the alarm system doing its job — not your heart failing — often takes some of the fear out of it.
Is a racing heart from anxiety dangerous?
For most people, a temporary rise in heart rate from anxiety is not harmful; the heart is built to beat fast during exercise and stress. The feeling usually settles as the anxious moment passes and your body clears the adrenaline. That said, a racing heart can also have medical causes — such as thyroid problems, anemia, certain medications, or heart-rhythm conditions — that can look like anxiety. This is one reason a clinician's evaluation is valuable if the symptom is new, frequent, or comes with other warning signs.
Easing a racing heart in the moment
Slowing your breathing helps because a longer, gentle exhale nudges your nervous system out of high alert. Try breathing in for about four counts and out for about six. Grounding your attention on what is around you, relaxing your shoulders, and reminding yourself the feeling is temporary can also bring your heart rate down. These steps do not need to work instantly to be working — they help the surge fade a little faster.
When a clinician helps
If your heart races often, or anxiety is shaping your days, it is worth seeing a clinician. A primary-care provider can rule out medical causes of a fast heartbeat — checking thyroid function, blood counts, and heart rhythm — before attributing it to anxiety 1Ref 1Connolly SD, Bernstein GA; Work Group on Quality Issues (AACAP) (2007).Practice Parameter for the Assessment and Treatment of Children and Adolescents With Anxiety Disorders.First-line anxiety care uses a multimodal assessment including ruling out comorbid and look-alike conditions before treating with CBT or SSRIs.. If anxiety is the driver, they or a behavioral-health colleague can identify the pattern using validated questionnaires and discuss treatment. Cognitive behavioral therapy helps retrain the brain's threat response so physical symptoms ease, and medication such as an SSRI is an option when symptoms are persistent; both have strong evidence behind them 2Ref 2Walter HJ, Bukstein OG, Abright AR, Keable H, Ramtekkar U, Ripperger-Suhler J, Rockhill C (2020).Clinical Practice Guideline for the Assessment and Treatment of Children and Adolescents With Anxiety Disorders.Both CBT and SSRI medication have considerable empirical support as effective treatments for anxiety.. A clinician can also help you tell ordinary anxiety apart from a condition that needs ongoing care 3Ref 3National Institute of Mental Health (NIMH) (2024).Anxiety Disorders.Occasional anxiety is normal, but an anxiety disorder involves persistent, excessive fear that does not go away..
Common questions
Can anxiety alone make my heart pound this hard?
Yes. Adrenaline from the fight-or-flight response can make a normal heartbeat feel forceful and fast. It is a common, usually harmless part of anxiety, though a one-time medical check is wise if you have never had the symptom evaluated.
How do I know if it is anxiety or a heart problem?
You often cannot tell for sure on your own, which is why an evaluation matters. Warning signs that point to getting checked promptly include chest pain, fainting, severe shortness of breath, or a heartbeat that stays fast and irregular at rest.
Will my heart get damaged from racing during anxiety?
A temporary rise in heart rate from stress is generally not harmful in an otherwise healthy heart, which is built to beat fast during exertion. Recurrent episodes are still worth discussing with a clinician.
Talk to a clinician
Dr. Marcus Reed, MD — Primary-care physician
Evaluating a racing heart, ruling out thyroid, blood-count, and heart-rhythm causes, and connecting anxiety-driven symptoms to CBT or SSRI treatment. Gale can match you with a licensed clinician for a visit.
Find care →Get checked promptly if you notice
- —Chest pain or pressure, especially with sweating or pain spreading to the arm or jaw
- —Fainting or near-fainting with the racing heart
- —A fast, irregular heartbeat that persists at rest
- —Severe shortness of breath that does not ease
If you have chest pain, fainting, or severe shortness of breath, call 911 or seek emergency care rather than waiting to see if it passes.
This article is general education and is not a diagnosis or a substitute for personalized medical care.
References
- 1.Connolly SD, Bernstein GA; Work Group on Quality Issues (AACAP) (2007). Practice Parameter for the Assessment and Treatment of Children and Adolescents With Anxiety Disorders. Journal of the American Academy of Child & Adolescent Psychiatry 46(2):267-283. doi:10.1097/01.chi.0000246070.23695.06 ✓First-line anxiety care uses a multimodal assessment including ruling out comorbid and look-alike conditions before treating with CBT or SSRIs.
- 2.Walter HJ, Bukstein OG, Abright AR, Keable H, Ramtekkar U, Ripperger-Suhler J, Rockhill C (2020). Clinical Practice Guideline for the Assessment and Treatment of Children and Adolescents With Anxiety Disorders. Journal of the American Academy of Child & Adolescent Psychiatry 59(10):1107-1124. doi:10.1016/j.jaac.2020.05.005 ✓Both CBT and SSRI medication have considerable empirical support as effective treatments for anxiety.
- 3.National Institute of Mental Health (NIMH) (2024). Anxiety Disorders. National Institute of Mental Health, NIH. link ✓Occasional anxiety is normal, but an anxiety disorder involves persistent, excessive fear that does not go away.
3 sources, numbered by first appearance. General health information, not medical advice — synthetic demonstration content.