Heart palpitations feel like your heart is pounding, fluttering, racing, or skipping beats. You notice them most in your chest, but many people also feel them in their throat or neck. The sensation can be startling, but most palpitations are harmless and pass on their own within seconds to a few minutes.
What makes palpitations unsettling is that you’re suddenly aware of your heartbeat in a way you normally aren’t. The specific sensation varies depending on what’s actually happening inside your heart, and understanding those differences can help you figure out whether what you’re feeling is routine or worth getting checked out.
The Most Common Sensations
People describe palpitations in a handful of ways, and you might experience more than one type at different times. The classic descriptions include a fluttering feeling in the chest (like a butterfly or a fish flopping), a pounding or thumping heartbeat you can feel without touching your chest, a racing sensation where your heart seems to be beating too fast, and the feeling that your heart “skipped” or “stopped” for a moment before resuming with a heavy thud.
That skipped-beat sensation is one of the most common and most alarming. What’s actually happening is a premature heartbeat, where your heart contracts slightly earlier than expected. The beat itself is often too weak to notice. What you feel is the pause that follows it and the extra-strong beat afterward. During that pause, your heart fills with more blood than usual, so the next contraction is more forceful. This is why it feels like your heart stopped and then slammed back into action. Some people describe it as an abrupt need to catch their breath.
Where You Feel Them
Most people feel palpitations in the center of the chest, which makes sense since that’s where you’re most aware of your heartbeat. But arteries in the neck carry a strong pulse, so it’s common to feel palpitations there too. Some people notice them primarily in the throat, especially the fluttering type, which can feel like a lump or a vibration. Feeling palpitations outside the chest doesn’t mean anything different medically. It’s the same event, just perceived in a different spot.
Different Rhythms Feel Different
Not all palpitations feel the same because not all rhythm disturbances behave the same way. The type of sensation you experience often reflects what’s happening electrically in your heart.
Premature beats (both from the upper and lower chambers of the heart) are the most common cause. They produce that isolated “skip and thump” feeling. They tend to come as single events or in short clusters and usually feel like a brief interruption rather than a sustained episode. Most happen quickly and without warning.
A rapid, regular pounding that starts and stops abruptly often points to a type of fast heart rhythm originating in the upper chambers. In these episodes, the heart can beat anywhere from 150 to 250 times per minute. That’s roughly double to triple the normal rate, and it feels like your heart is suddenly racing at full speed with no warm-up. People often describe chest tightness and shortness of breath alongside it.
An irregular, chaotic fluttering where the rhythm seems completely unpredictable is more characteristic of atrial fibrillation. Instead of a steady rapid beat, the heart seems to jump around with no pattern. This can last minutes, hours, or longer, and often comes with fatigue or feeling winded during normal activity.
Common Triggers
Palpitations don’t always appear out of nowhere. Many have clear triggers you can identify and, in some cases, avoid.
Caffeine is one of the most well-known triggers. If you drink more than three cups of coffee a day, you’re more likely to notice palpitations. But caffeine also hides in tea, energy drinks, chocolate, and soda. Chocolate contains a naturally occurring compound from cacao that directly increases heart rate.
Certain foods can also set them off. High-sugar and high-carbohydrate meals can spike your blood sugar, and the resulting insulin response sometimes triggers palpitations, especially if you tend toward low blood sugar. Spicy or rich foods that cause heartburn can mimic or trigger a racing heart. Aged cheeses, cured meats, dried fruit, and alcohol contain an amino acid that raises blood pressure and can cause palpitations in sensitive people. High-sodium processed foods are another common culprit.
Stress and anxiety are among the most frequent triggers. Your body’s fight-or-flight response releases adrenaline, which speeds up your heart and makes you hyperaware of every beat. Several herbal supplements can also contribute, including ginseng, bitter orange, ephedra, and valerian. Even prescription medications for allergies, asthma, thyroid conditions, and blood pressure can list palpitations as a side effect.
Anxiety Palpitations vs. Heart-Related Palpitations
This is the distinction most people searching this topic really want to understand. Anxiety-driven palpitations tend to start suddenly, often in response to a stressful situation, and they typically resolve within a few minutes once the trigger passes. They come on fast and leave fast.
Palpitations tied to a heart rhythm problem behave differently. They may last longer than a few minutes, happen without any emotional trigger, occur during rest or sleep, or come back frequently over days and weeks. They’re also more likely to bring other symptoms along with them: dizziness, lightheadedness, shortness of breath, or chest discomfort.
The overlap can be confusing because anxiety itself can cause chest tightness and breathlessness. One useful pattern to notice: anxiety palpitations tend to match up with how you’re feeling emotionally, while cardiac palpitations can appear when you’re calm, relaxed, or even lying in bed at night.
Symptoms That Need Immediate Attention
Most palpitations are not dangerous. But certain combinations of symptoms signal that something more serious may be going on. A sudden collapse or loss of consciousness alongside palpitations is a reason to call emergency services immediately. A racing heart paired with dizziness and lightheadedness also warrants an emergency visit. Chest pain during palpitations should be treated as an emergency until proven otherwise.
Sustained palpitations that don’t stop after several minutes, especially if accompanied by confusion, trouble breathing, or a feeling like you might faint, fall into this category too.
How Palpitations Are Diagnosed
The challenge with 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 rhythm at a single point in time, which is useful if you’re having symptoms right then but may miss an issue that comes and goes.
For intermittent palpitations, doctors typically use a Holter monitor, a small wearable device that records your heart’s rhythm continuously for one to two days. You go about your normal routine while it collects data. If one to two days isn’t enough to catch an episode, the next step is an event monitor, which you wear for several weeks. With an event monitor, you press a button when you feel symptoms, and the device captures the heart rhythm at that moment. This pairing of what you feel with what your heart is actually doing is the key to getting a diagnosis.
Keeping a symptom journal can speed up the process. Note when palpitations happen, how long they last, what you were doing or eating beforehand, and any other symptoms that came with them. This gives your doctor a much clearer picture than a vague report of “my heart feels funny sometimes.”
What Typically Causes Them
Beyond the everyday triggers like caffeine and stress, several medical conditions can produce palpitations. An overactive thyroid gland is one of the more common causes, because excess thyroid hormone directly speeds up heart rate. Heart valve problems can create turbulent blood flow that you feel as a fluttering or pounding. Inflammation of the heart muscle, sometimes caused by a viral infection, can irritate the electrical system and trigger irregular beats.
Dehydration, low potassium or magnesium levels, fever, and anemia can all make palpitations more likely because they force the heart to work harder with fewer resources. Hormonal shifts during pregnancy, menstruation, and menopause are well-established triggers too.
For the majority of people, palpitations turn out to be benign premature beats or the physical effects of stress and stimulants. They feel alarming precisely because the heart is one organ you expect to beat steadily and silently, so any disruption to that rhythm grabs your attention. Understanding what you’re feeling, and why, makes the experience significantly less frightening.