You are lying in bed, sitting in a meeting or standing in a queue, doing nothing strenuous, when you suddenly become aware of your heart. It is pounding. Or racing. Or it does something worse: a flutter, a skipped beat, a single heavy thud that lands like a fist against your ribs. Your hand goes to your wrist or your neck, you start counting, and within seconds a quiet evening has turned into a private emergency.
Palpitations, the felt awareness of your own heartbeat, are one of anxiety's most common and most frightening physical symptoms. Every flutter arrives pre-loaded with dread, and that dread can feed the symptom. The good news first: the NHS describes heart palpitations as common and not usually a sign of anything serious, and it lists stress and anxiety among the everyday causes. Here is what is happening, when to see a doctor, and what helps once your heart has been checked.
Why Anxiety Makes Your Heart Pound, Race, and Flutter
When your brain decides something is threatening, whether a real emergency or a stressful email, it switches on the stress response. Adrenaline tells the heart to beat faster and more forcefully, because a body preparing to act needs blood delivered to the muscles. Faster is the racing; more forceful is the pounding you feel in your chest, neck or throat.
Skipped beats and flutters. The NHS lists several ways palpitations can feel: racing, pounding or thumping, fluttering, or irregular with skipped or extra beats, which it calls ectopic beats. The lurch-pause-thud that scares people most feels like the heart stopped, but what people usually notice is an extra beat, a pause and a stronger beat. Stress, caffeine, alcohol, nicotine and short sleep are all on the NHS list of triggers, so flutters tend to cluster on exactly the days you are least able to shrug them off.
Stillness turns the volume up. Palpitations often feel worst in bed at night and in quiet moments. Lying still, with no distractions and your chest against the mattress, is simply a good listening environment. Attention works like a magnifying glass, and the same amplification is behind many physical symptoms of anxiety, and if nights are your worst time, our guide to nighttime anxiety and sleep covers the wider pattern.
Checking keeps the signal alive. Once a palpitation has scared you, your heartbeat gets promoted to conscious supervision. You check your pulse, the checking itself is a small alarm, the rate nudges up, and the worry seems confirmed. The monitoring feels like safety; in practice it often keeps the loop running. Our article on the health anxiety checking loop explains this pattern in detail.
None of this means every palpitation is anxiety. The same sensations can come from medicines, thyroid problems, anaemia or a heart rhythm problem, and a feeling cannot tell you which one you have.
Anxiety or a Heart Problem? When to See a Doctor
No calming technique works while part of your brain is still asking "but what if it's my heart?" The honest answer is that you cannot settle that at home. Whether an episode happened at rest, whether it faded during a film, or what your watch showed: none of these is a reliable test. The question is answered by a clinician with a recording of your heart.
What you can do at home is know the thresholds. Based on the NHS guidance on palpitations:
Call 999 (or your local emergency number) or go to A&E if you have palpitations right now that do not go away, or palpitations together with chest pain, shortness of breath, or feeling faint or fainting. Do not try to breathe your way through these first.
See a GP if you feel well but your palpitations keep coming back or are happening more often, last longer than a few minutes, or if you have a heart condition or a family history of heart problems. Palpitations that start during exercise, and a family history of sudden cardiac death, are also worth raising specifically.
What the check involves. A clinician will ask about your history and may do an electrocardiogram (ECG), a simple recording of your heart's electrical activity. Because palpitations come and go, they may suggest a monitor worn for a period to catch an episode, and blood tests for things like anaemia or thyroid problems.
Bring good notes. Write down when episodes started, how long they last, what you were doing, what else you felt, and any medicines, caffeine, alcohol or nicotine beforehand.
One good assessment does what no midnight pulse count can: it gives the fear a real answer. If the pounding arrives as a sudden overwhelming wave of terror, see how to stop a panic attack; for a tight chest, see anxiety chest tightness, remembering that chest pain with palpitations is an emergency threshold.
How to Calm a Racing Heart Right Now
These steps are for episodes a clinician has assessed and linked to anxiety. If an episode is new, different from usual, or comes with any warning sign above, get medical help first. None of these steps treats a heart rhythm problem or guarantees your heart rate will drop on cue; they stop adding fuel to the fear.
1. Lengthen your exhale. Your heart rate is not under direct voluntary control, but your breath is. Breathe in gently through your nose and let the out-breath be a little longer and slower than the in-breath, for example in for about four counts and out for about six. Keep it comfortable, and stop if you feel lightheaded. Many people feel more settled within a few minutes. If counting falls apart when you are anxious, a visual pacer like Flow Breath holds the rhythm for you. Box breathing and the physiological sigh are other patterns.
2. Stop taking your pulse. Every check is another rep for the alarm loop. When the urge comes, notice it ("there is the checking urge"), let it pass, and give your attention a job outside your body. Naming five things you can see, or any of these grounding techniques, works well. It feels reckless at first, but with a clinician's plan in place it is how the loop winds down. It never means ignoring a new or worsening symptom.
3. Change your physical state. Some people find that cool water on the face, fresh air, or a slow walk helps them reset. Keep it gentle, and sit down instead if you feel faint or unwell.
4. Cut the fuel for the rest of the day. Skip the next coffee or energy drink, and go easy on alcohol and nicotine. The NHS notes that avoiding triggers such as stress, smoking, caffeine and alcohol can help when palpitations are not caused by a health condition. See caffeine and anxiety and hangxiety for more.
Why It Keeps Coming Back
What often keeps palpitations returning is the loop on top: a flutter triggers fear, fear triggers stress hormones and checking, the heartbeat becomes more noticeable, and the sequence seems to prove the heart is fragile. This fear of the symptom itself, known as anxiety sensitivity, is a big part of why the same extra beat that one person never notices costs another person a night of sleep.
The other half is the baseline. Palpitation days often follow short nights, heavy caffeine, alcohol the evening before, and high-pressure stretches at work. Logging episodes in AnxietyPulse with the time, duration, symptoms, and context such as sleep, caffeine and stress builds a picture memory cannot; after a few weeks you may notice flutters tend to follow late espresso or five-hour nights. Treat that as context to discuss with your clinician, not proof of the cause, and seek reassessment if the pattern changes.
Heart data can shift from threat to information in the same way. Heart rate variability is not a diagnostic test, but a calm look at trends once a day says something about how loaded your week has been, which beats checking in fear ten times an hour.
When to Get Extra Support
If you are organizing your life around palpitations, or each reassurance stops working within days, bring in a professional rather than white-knuckling it alone. Cognitive behavioural approaches can help with the fear-and-checking loop, often through gradual practice like that in our guide to exposure therapy. If extra beats themselves are frequent and bothersome, your doctor can discuss options, and changed symptoms deserve another look. Getting help after an assessment is not overreacting; it treats the part of the problem that is still active.
Frequently Asked Questions
Can anxiety cause heart palpitations?
Yes. The NHS lists stress and anxiety among the common causes of palpitations. The stress response makes the heart beat faster and harder, and anxious attention makes every beat easier to notice. Other causes exist, so new or recurring palpitations still deserve a medical check.
How do I know if my palpitations are anxiety or my heart?
Not from the feeling, the timing or a smartwatch. A clinician can, using your history, an ECG and sometimes a monitor. See a GP if they keep coming back, last more than a few minutes, or you have a heart condition or family history of heart problems.
When are heart palpitations an emergency?
Call your emergency number or go to A&E if palpitations do not go away, or come with chest pain, shortness of breath, or feeling faint or fainting. Do not wait for a breathing exercise to work.
How do I calm a racing heart from anxiety?
Once your episodes have been assessed: a longer, comfortable exhale, no pulse checks, grounding, and less caffeine, alcohol and nicotine that day. These ease the anxious spiral; they do not treat a rhythm problem.
Why are my palpitations worse at night?
Lying still in a quiet room makes your heartbeat much easier to notice, and late caffeine, alcohol or an anxious mind can add to it. If night-time episodes are new or changing, mention them to your doctor.
Are skipped heartbeats from anxiety dangerous?
The NHS describes palpitations, including skipped or extra (ectopic) beats, as usually not a sign of anything serious. Only an assessment can tell you about your own beats, so get recurring or changing episodes checked, and seek urgent help with the warning signs above.
The Takeaway
Anxiety can make your heart pound because the stress response is doing its job, and attention and fear make every flutter feel enormous. Get new, recurring or changing palpitations checked, and know the emergency signs: palpitations that will not go away, or that come with chest pain, breathlessness or fainting. Once your episodes are assessed, use a longer exhale, fewer pulse checks, grounding, and less caffeine and alcohol, and keep a simple trigger record. Your heart has been beating without supervision since before you were born; learning to let it is a big part of feeling calm again.
This article is for informational purposes only and is not a substitute for professional medical advice. Seek urgent help for palpitations that do not go away or occur with chest pain, breathlessness, fainting or feeling faint. New, recurring or changing palpitations, episodes during exertion, and a family history of sudden cardiac death warrant clinical assessment.