A heart palpitation is a noticeable sensation of your own heartbeat. It can feel like your heart is racing, pounding, fluttering, flip-flopping, or skipping a beat. Most people feel palpitations in their chest, but they can also show up in the throat or neck. They’re extremely common, usually harmless, and often linked to everyday triggers like caffeine, stress, or poor sleep.
What Palpitations Actually Feel Like
People describe palpitations in a handful of ways. Some feel a sudden pounding, as if the heart is beating harder than normal. Others notice a fluttering or flip-flopping sensation, almost like a fish jumping in the chest. One of the most unsettling descriptions is the feeling that the heart “skipped a beat” or added an extra one. That skip is typically a premature beat followed by a brief pause before the next normal beat, and the stronger-than-usual beat afterward is what you actually feel.
Palpitations can last a fraction of a second or go on for minutes. Some people notice them only when lying down at night, when there’s less noise and distraction to mask the sensation. Others feel them during physical activity or moments of strong emotion. The experience is subjective: two people with the exact same heart rhythm can differ in whether they notice it at all.
Common Triggers
Most palpitations trace back to something the body is reacting to rather than a structural heart problem. Caffeine is one of the most frequently reported triggers. It’s a central nervous system stimulant that increases alertness but can also nudge the heart into faster or irregular rhythms, especially at higher doses. Alcohol is another well-known culprit. Binge drinking in particular is linked to a phenomenon sometimes called “holiday heart syndrome,” where the heart falls into an abnormal rhythm during or shortly after heavy alcohol use. Combining caffeine and alcohol may amplify the effect, since caffeine can mask alcohol’s sedative qualities and lead to more consumption.
Stress, anxiety, and panic attacks are powerful triggers because they activate the body’s fight-or-flight response, flooding the system with adrenaline. Lack of sleep does something similar, leaving the nervous system in a more reactive state. Nicotine, decongestants, and some herbal supplements can also set off palpitations. Even dehydration or a large meal can be enough in some people.
Hormonal and Nutritional Causes
Hormonal shifts play a real but complicated role. During pregnancy, blood volume increases significantly, and the heart works harder to keep up, making palpitations more common. During perimenopause and menopause, some studies show that palpitations increase as women move through later menopausal stages, though the evidence is mixed. Women who undergo surgical menopause tend to report more palpitations than those who transition naturally, suggesting the abruptness of the hormonal change may matter. An overactive thyroid gland is another hormonal cause, since excess thyroid hormone directly speeds up the heart rate.
Electrolyte imbalances can also trigger rhythm disturbances. Potassium and magnesium are both critical for normal electrical signaling in the heart. Low potassium levels alter how cardiac tissue conducts electrical impulses and can produce abnormal rhythms. Low magnesium can cause a dangerous type of irregular heartbeat and is sometimes worsened by certain medications, alcohol use, or thyroid dysfunction. These deficiencies are more likely in people who take diuretics, exercise heavily without replacing fluids, or eat a highly processed diet low in fruits and vegetables.
When Palpitations Signal a Heart Condition
A small percentage of palpitations are caused by an underlying rhythm disorder. The most common of these are premature beats, either from the upper chambers (premature atrial contractions) or the lower chambers (premature ventricular contractions, or PVCs). Nearly everyone has occasional premature beats, and they rarely mean anything serious. They’re responsible for that classic “skipped beat” sensation.
More significant rhythm problems include atrial fibrillation (AFib), where chaotic electrical signals cause the upper chambers to quiver rapidly and irregularly. AFib episodes can come and go on their own or persist until treated. Supraventricular tachycardia (SVT) is another possibility, characterized by sudden episodes of a very fast heartbeat that start and stop abruptly. SVT can feel alarming but is often manageable. These conditions are worth identifying because some, particularly AFib, carry risks like blood clots and stroke if left untreated over time.
Palpitations accompanied by chest pain, fainting, severe shortness of breath, or prolonged dizziness are a different situation entirely. These combinations can indicate that the heart isn’t pumping blood effectively and need prompt medical evaluation.
How Palpitations Are Diagnosed
The challenge with diagnosing palpitations is that they’re often intermittent. A standard electrocardiogram (EKG) records the heart’s electrical activity for about 10 seconds, which is useful only if the palpitation happens to occur during that window. If it doesn’t, the next step is typically a Holter monitor, a small portable device you wear for one to two days that continuously records your heart rhythm during normal activities.
If palpitations happen less than once a week, a Holter monitor may still miss them. In that case, an event recorder is a better option. You wear it for up to 30 days and press a button when you feel symptoms, capturing the rhythm at the exact moment something feels off. This gives your doctor a direct look at what your heart is doing during the episodes you’re concerned about. Blood tests to check thyroid function, electrolyte levels, and anemia are also standard parts of the workup.
Reducing Palpitations on Your Own
For the majority of people whose palpitations are benign, lifestyle adjustments can make a significant difference. Cutting back on caffeine is a logical first step, especially if you’re consuming more than two or three cups of coffee per day. Reducing alcohol intake, staying well hydrated, and getting consistent sleep all help keep the nervous system from overreacting.
Stress management matters more than most people expect. Chronic stress keeps adrenaline levels elevated, which makes the heart more reactive to any additional trigger. Regular physical activity, deep breathing exercises, and adequate rest can lower that baseline level of activation. If you notice palpitations during or after eating, large carbohydrate-heavy meals are a common trigger, and eating smaller portions may help.
Vagal maneuvers, simple techniques like bearing down as if having a bowel movement, splashing cold water on your face, or coughing forcefully, can sometimes interrupt a fast heart rhythm by stimulating the vagus nerve, which helps slow the heart rate. These are most effective for episodes of SVT and won’t do much for a single skipped beat, but they’re worth knowing about if you experience repeated racing episodes.