A heart palpitation is the sensation of your heart beating in a way you can suddenly feel. Most of the time, your heartbeat runs quietly in the background. A palpitation is the moment it doesn’t, whether it feels like a flutter, a thud, a skip, or a racing in your chest. They’re extremely common: roughly 90 out of 100 people will experience palpitations over any given few-month stretch.
What Palpitations Actually Feel Like
People describe palpitations in surprisingly different ways, which can make them confusing. The most common sensations include a heart that feels like it’s beating too fast, pounding hard enough to notice, flip-flopping in your chest, fluttering rapidly, skipping a beat, or adding an extra beat. Some people feel palpitations not in the chest at all but in the throat or neck. The sensation can last a single beat or stretch on for minutes.
What’s usually happening is a brief disruption in the heart’s normal electrical rhythm. Your heart might fire an extra beat slightly early, then pause a fraction longer before the next one. That pause and the stronger beat that follows it create the “skipping” or “thudding” sensation. In other cases, the upper chambers of the heart may briefly flutter or race before settling back into their regular pattern.
Common Triggers
Most palpitations trace back to something your body is reacting to rather than a problem with the heart itself. Caffeine is one of the most recognized triggers, though the relationship is more nuanced than people assume. Moderate caffeine intake, up to about three cups of coffee a day, doesn’t appear to cause problems for most people and may even have cardiovascular benefits. Drinking more than that, or consuming energy drinks with high caffeine concentrations, is where palpitations become more likely.
Alcohol is another frequent culprit. It can trigger irregular rhythms in the heart’s upper chambers, a condition called atrial fibrillation. Nicotine, dehydration, spicy food, and stress all activate your body’s fight-or-flight response, which can push your heart rate up and make you aware of beats you’d normally never notice.
Intense emotions work the same way. Anxiety, fear, and even excitement flood your system with adrenaline, and the resulting heart-pounding sensation is a palpitation by definition, even though nothing is wrong with the heart.
Medical Conditions Behind Palpitations
Sometimes palpitations point to something the body needs help with. Thyroid disorders are a classic example. An overactive thyroid speeds up your metabolism and heart rate, making palpitations a frequent early symptom. Anemia, where your blood carries less oxygen than normal, forces the heart to pump faster to compensate. Low levels of key electrolytes like potassium and magnesium can destabilize the heart’s electrical signals directly.
Hormonal shifts play a significant role, especially for women. Fluctuating hormone levels during menstruation, pregnancy, and menopause all make palpitations more likely. As many as 54% of women report palpitations during menopause, often alongside hot flashes and night sweats. These hormone-driven palpitations are typically benign, but they can be unsettling when they’re new.
When Palpitations Signal Something Serious
The vast majority of palpitations are harmless. But certain accompanying symptoms change the picture. Palpitations paired with chest pain, dizziness, lightheadedness, or fainting need emergency evaluation. These combinations can indicate an unstable heart rhythm that requires immediate treatment.
Two other benchmarks are worth knowing. A heart rate above 110 beats per minute during a palpitation episode may indicate an arrhythmia that needs medical attention. And palpitations that continue for an hour or more, even without other symptoms, should be evaluated further.
How Palpitations Are Diagnosed
The tricky part of diagnosing palpitations is that they’re often gone by the time you’re sitting in a clinic. An electrocardiogram (ECG) records your heart’s electrical activity in real time, using sticky patches placed on your chest. It’s quick and painless, but it only captures what’s happening in that moment.
If a standard ECG doesn’t catch anything, the next step is usually a portable monitor. A Holter monitor is a small device you wear for a day or more while going about your normal routine, recording every heartbeat. For palpitations that happen less than once a week, an event recorder works differently: you wear it for up to 30 days and press a button when you feel symptoms, so the device captures only those episodes. Some smartwatches now offer similar remote ECG monitoring.
If there’s concern about the heart’s structure, an echocardiogram uses sound waves to create a moving picture of your heart, checking for blood flow problems or structural abnormalities that might explain the irregular rhythm.
Managing Palpitations at Home
When palpitations strike, the first thing that helps is staying calm. Tensing up or letting your mind race tends to amplify the sensation and can trigger more palpitations through the stress response. Box breathing is a simple technique that works well: inhale slowly for a count of four, hold for four, exhale for four, hold for four, and repeat until the palpitations settle.
Vagal maneuvers are another option. These are physical actions that stimulate the vagus nerve, which helps regulate heart rhythm. You can splash cold water on your face, bear down as if you’re trying to have a bowel movement, or exhale hard through pursed lips as though blowing through a straw. For some people, submerging the face in a bowl of cold water is more effective than a splash.
Dehydration is an underappreciated trigger. If you haven’t been drinking enough fluids, rehydrating with an electrolyte-rich drink can help. Sports drinks work, as do electrolyte powders dissolved in water. Even plain water with a small pinch of salt provides a basic electrolyte boost.
For longer-term management, keeping a symptom diary can be revealing. Write down when palpitations happen and what you were doing, eating, or drinking beforehand. Over time, patterns often emerge: that third cup of coffee, a glass of wine, a stressful meeting, or a night of poor sleep. Once you identify your triggers, you can adjust accordingly. Cutting back on caffeine beyond moderate levels, reducing alcohol, quitting smoking, and maintaining a regular exercise routine are the lifestyle changes that make the biggest difference for most people.