Heart palpitations are sensations of your heart racing, pounding, fluttering, or skipping beats. You feel them in your chest, throat, or neck. They’re one of the most common reasons people visit a doctor for heart-related concerns, and the vast majority turn out to be harmless. That said, understanding what triggers them and when they signal something more serious can save you a lot of anxiety.
What Palpitations Actually Feel Like
People describe palpitations in different ways, but the most common sensations include a heart that feels like it’s racing, pounding hard enough to notice, skipping a beat, adding an extra beat, flip-flopping, or fluttering. Some people feel them only in the chest, while others notice a pulsing or thumping in the throat or neck. Episodes can last a few seconds or stretch on for minutes.
What’s happening physically varies. Sometimes the heart genuinely speeds up or produces an extra beat. Other times, you’re simply becoming aware of your normal heartbeat in a way you usually don’t notice. Both scenarios can produce that unsettling “something is wrong” feeling, even when nothing is.
Common Triggers
Most palpitations trace back to everyday triggers rather than heart disease. Stress and anxiety top the list. When your body shifts into fight-or-flight mode, it releases hormones that speed up your heart rate and can make beats feel more forceful. Intense emotions, poor sleep, and even excitement can do the same thing.
Caffeine gets blamed often, and for some people it’s a genuine trigger, but the relationship is more nuanced than most people assume. Studies, including randomized trials, have found that “usual amounts” of caffeine don’t increase the risk of abnormal heart rhythms in most people. However, individual sensitivity varies. If you’ve noticed palpitations after coffee or tea, you may be one of those more sensitive individuals. Energy drinks with high caffeine doses are a different story and worth avoiding. Nicotine and alcohol are clearer triggers. Research consistently shows that alcohol makes the heart more prone to rhythm disturbances, and randomized trials have confirmed that people who abstain experience fewer episodes of irregular heartbeats than those who keep drinking.
Other common triggers include dehydration, vigorous exercise, hormonal shifts (especially during menstruation, pregnancy, or menopause), and certain medications like decongestants and allergy drugs.
Medical Conditions That Cause Palpitations
When palpitations aren’t tied to lifestyle triggers, several medical conditions can be responsible. The most direct cause is an arrhythmia, which is any abnormality in the heart’s electrical rhythm. Some arrhythmias are minor, like premature ventricular contractions (PVCs), which are extra beats that feel like your heart skipped. Others, like atrial fibrillation, involve the upper chambers of the heart quivering erratically instead of beating in a coordinated way.
Thyroid disorders are another common culprit. An overactive thyroid floods the body with hormones that rev up the heart rate, often producing palpitations alongside weight loss, anxiety, and heat sensitivity. An underactive thyroid can also disrupt heart rhythm, though less commonly.
Electrolyte imbalances play a surprisingly direct role. Minerals like potassium, sodium, calcium, and magnesium help trigger and conduct the electrical signals that keep your heart beating in rhythm. When these levels drop too low or climb too high, from dehydration, intense exercise, certain medications, or kidney problems, the heart’s signaling can misfire. Anemia, where the blood carries less oxygen than normal, forces the heart to work harder and beat faster to compensate, which can also produce palpitations.
Sleep apnea is an underrecognized cause. The repeated pauses in breathing during sleep can lead to slow heartbeats and irregular rhythms, including atrial fibrillation. People with untreated sleep apnea sometimes wake with palpitations or notice them more in the morning.
How Doctors Evaluate Palpitations
The tricky part of diagnosing palpitations is that they often come and go. Your heart may behave perfectly during an office visit. That’s why doctors use several tools depending on how frequently your episodes occur.
The starting point is an electrocardiogram (ECG), a quick, painless test where sticky patches on your chest record your heart’s electrical activity. It can reveal if the heart is beating too fast, too slow, or irregularly, but only captures what’s happening in that moment. If your palpitations are infrequent, a normal ECG doesn’t rule anything out.
For palpitations that happen daily or nearly daily, a Holter monitor is the next step. This is a portable ECG device you wear for one to two days while going about your normal life. It records every heartbeat during that window, catching irregularities that a brief office ECG would miss.
If episodes happen less than once a week, an event recorder is more practical. You wear it for up to 30 days and press a button when you feel symptoms. The device captures the heart’s rhythm at that moment, giving your doctor a snapshot of exactly what your heart is doing when you feel the palpitation. Some smartwatches now offer basic ECG monitoring that can serve a similar purpose, though they’re less precise than medical-grade devices.
An echocardiogram, which uses ultrasound to create moving images of the heart, may be ordered if your doctor suspects a structural problem, like a valve issue or thickened heart muscle, contributing to the palpitations.
Reducing Palpitations on Your Own
For palpitations without an underlying medical cause, lifestyle changes are the primary treatment. Limiting alcohol to no more than three drinks per week (or eliminating it entirely) significantly reduces episodes in people prone to rhythm disturbances. Cutting back on caffeine is worth trying if you suspect sensitivity, though you don’t necessarily need to quit entirely. Staying well hydrated, managing stress through regular exercise or relaxation techniques, and getting consistent sleep all help stabilize heart rhythm. Brisk walking for about 150 minutes per week has protective effects against recurrent rhythm problems.
When palpitations strike, some people find relief through vagal maneuvers, techniques that stimulate the vagus nerve and can slow a racing heart. The most common is the Valsalva maneuver: lie on your back, take a deep breath, then bear down as if exhaling hard against a closed mouth and nose for 10 to 30 seconds. It should feel like trying to push air through a blocked straw. Another approach is the diving reflex, where you submerge your face in ice-cold water or press an ice-cold wet towel against your face. These techniques work best for certain types of fast heart rhythms and should be discussed with your doctor before you try them regularly.
When Palpitations Are Serious
Most palpitations are benign, but certain accompanying symptoms change the picture. Palpitations paired with chest pain lasting more than a few minutes, dizziness or fainting, or significant shortness of breath require emergency medical attention. These combinations can indicate a dangerous arrhythmia or another cardiac event that needs immediate treatment.
Palpitations that consistently happen during physical exertion rather than at rest, episodes that last many minutes without stopping, or a resting heart rate that stays above 100 beats per minute also warrant medical evaluation. A family history of sudden cardiac death or inherited heart conditions lowers the threshold for getting checked out. For most people, though, palpitations are a manageable nuisance rather than a sign of serious disease, and identifying your personal triggers goes a long way toward making them less frequent and less frightening.