Heart palpitations feel like your heart is racing, pounding, fluttering, flip-flopping, or skipping beats. Most people notice them as a sudden, uncomfortable awareness of their own heartbeat in situations where they normally wouldn’t feel it at all. The sensation is common, usually harmless, and can last anywhere from a few seconds to several minutes.
What the Sensation Actually Feels Like
People describe palpitations in several distinct ways, and you may experience more than one type. The most common descriptions are a rapid pounding in the chest, a fluttering feeling (like a butterfly trapped behind your ribs), or a flip-flopping sensation where the heart seems to tumble over itself. Some people feel a hard thump followed by a brief pause, which they interpret as their heart “skipping a beat.”
That skipped-beat feeling deserves a closer explanation, because the mechanics behind it are counterintuitive. What’s actually happening in most cases is a premature heartbeat, where the heart fires slightly early. The premature beat itself is weak and easy to miss. But after it, the heart pauses slightly longer than usual before the next beat. During that extra pause, the heart fills with more blood than normal, so the following beat is unusually strong. That forceful thump is what you actually feel. Some people describe it as the heart stopping for a moment and then slamming back to life, or a sudden jolt that makes them feel like they need to catch their breath.
Where You Feel Them
Most people feel palpitations in the center of the chest, which makes sense given the heart’s location. But the sensation doesn’t always stay there. It’s common to feel a fluttering or throbbing in the throat or neck, particularly during episodes of rapid heartbeat. Some people notice them in their ears when lying down at night, hearing or feeling each beat more prominently when the room is quiet and they’re still. The left side of the chest, just below the collarbone, is another spot where palpitations tend to register.
Common Triggers
Palpitations often have a clear trigger, even if it doesn’t seem obvious in the moment. Caffeine is one of the most frequent culprits. It stimulates the central nervous system and can make the heart race, raise blood pressure, and provoke palpitations, especially in people with caffeine sensitivity. Coffee is the obvious source, but chocolate, soda, certain teas, some ice creams, and over-the-counter headache medications also contain enough caffeine to cause problems in sensitive individuals.
Stress and anxiety are equally reliable triggers. When your body enters a stress response, adrenaline surges, heart rate climbs, and you become hyperaware of each beat. Intense exercise, dehydration, lack of sleep, and alcohol can all do the same thing. Hormonal shifts during menstruation, pregnancy, or menopause are another well-documented cause.
Several categories of medication can provoke palpitations as a side effect. Asthma inhalers (bronchodilators) stimulate the same receptors that adrenaline does, which can speed up the heart. Over-the-counter decongestants used for colds and allergies have a similar effect. Stimulant medications used for ADHD, some antidepressants, and even common anti-inflammatory painkillers have been linked to heart rhythm changes. Illicit stimulants like cocaine and amphetamines carry a much higher risk. If you notice palpitations starting or worsening after beginning a new medication, that connection is worth bringing up with your provider.
Palpitations That Need Attention
The vast majority of palpitations are benign. A few seconds of fluttering after your third cup of coffee, or a skipped beat during a stressful meeting, is not typically dangerous. What changes the picture is when palpitations come with other symptoms: chest pain or pressure, dizziness or lightheadedness, fainting or near-fainting, shortness of breath that feels out of proportion, or episodes that last many minutes and don’t resolve on their own.
Palpitations that start suddenly during exercise, happen repeatedly without an obvious trigger, or feel like a sustained rapid heartbeat (rather than a brief skip or flutter) also warrant evaluation. A heart rate that shoots above 150 beats per minute at rest, or a rhythm that feels chaotic and irregular rather than just fast, is more likely to reflect an arrhythmia that needs treatment.
How Palpitations Are Diagnosed
The tricky part of diagnosing palpitations is that they’re often gone by the time you’re sitting in a doctor’s office. A standard electrocardiogram (EKG) captures your heart’s electrical activity in real time, but only for the few seconds you’re hooked up. If your heart is behaving normally at that moment, the test won’t show anything.
When palpitations are frequent, the next step is usually a Holter monitor, a small wearable device that records your heart rhythm continuously for 24 to 48 hours. You go about your normal life while it collects data, and your doctor reviews the full recording afterward. If your episodes are less frequent, an event monitor works differently. You wear it for days or weeks, but it only records when you press a button during symptoms. This makes it more practical for catching palpitations that happen a few times a week rather than every day.
In many cases, these monitors reveal premature beats or brief rhythm changes that are completely normal and need no treatment. That confirmation alone can be reassuring, since anxiety about palpitations often makes them worse and more frequent.
Reducing Palpitations on Your Own
If your palpitations have been evaluated and found to be benign, several practical steps can reduce how often they happen. Cutting back on caffeine is the most straightforward change, and it’s worth tracking all sources, not just coffee. Limiting alcohol, staying well hydrated, and prioritizing sleep all help stabilize heart rhythm. Managing stress through regular physical activity, breathing exercises, or other relaxation techniques can lower the baseline adrenaline levels that make palpitations more likely.
During an episode, slow deep breathing or bearing down gently (as if you’re straining) can sometimes reset the rhythm by activating the vagus nerve, which helps slow the heart rate. Splashing cold water on your face has a similar effect. These techniques won’t work for every type of palpitation, but they’re safe to try and often shorten episodes that feel unsettling.