Heart Palpitations: What They Mean and When to Worry

What palpitations feel like (and what they are)

Palpitations are a symptom, not a diagnosis.

People describe them as a flutter in the chest, a sudden thump, a rapid heartbeat, or a feeling that the heart “skipped” and then hit hard. You might feel it in your chest, throat, or neck.

Often, the sensation comes from a normal heartbeat that you are noticing more than usual. Other times it comes from extra beats (common and frequently benign) or from a sustained abnormal rhythm (an arrhythmia) that deserves medical attention.

It can help to separate two questions: what your heart is doing, and why you are feeling it. Things that increase adrenaline, change fluid and salt balance, or irritate the heart’s electrical system can all make palpitations more likely.

Common reasons palpitations happen

Many palpitations start outside the heart.

Stress, anxiety, and adrenaline

Strong emotions, panic, and ongoing stress can raise adrenaline and make the heartbeat feel louder or faster. Sleep loss can amplify this effect, so can intense workouts or rushing through the day.

This can overlap with Emotional Health. If you notice palpitations during worry spirals, after arguments, or when you are “on edge,” the trigger may be your stress response rather than a heart problem.

Caffeine, nicotine, alcohol, and other stimulants

Coffee, energy drinks, nicotine, pre workout products, and some cold or allergy medicines can trigger palpitations in sensitive people. Alcohol can also do it, especially with dehydration or poor sleep.

Even if you have used a product for years, your tolerance can change with age, illness, or hormonal shifts.

Dehydration and electrolyte shifts

When you are low on fluids, your heart may beat faster to maintain blood pressure. Changes in electrolytes, especially potassium and magnesium, can make the heart’s electrical system more irritable.

This is one reason palpitations sometimes show up after vomiting, diarrhea, heavy sweating, fasting, or starting a new diuretic (water pill). Food quality matters here too, because electrolytes and supportive Micronutrients often come from regular meals.

Hormones and life stages

Palpitations can occur during pregnancy, around the menstrual cycle, and during perimenopause and menopause. Hot flashes and night sweats can come with a racing heart sensation.

If you use Menopause Hormone Therapy or other hormonal medications, new palpitations are worth discussing with your clinician, particularly if the timing matches a dose change.

Medical conditions that can contribute

Some health issues make palpitations more likely, including thyroid disease, anemia, fever, low blood sugar, and uncontrolled high blood pressure. Sleep apnea is another common contributor, especially when palpitations happen at night or you wake up gasping.

Most of these are treatable, but they require proper evaluation rather than guesswork.

Normal versus worth checking

A few brief flutters that stop on their own can be normal, especially with stress, caffeine, or dehydration.

Patterns matter more than any single episode. Palpitations are more concerning when they are new for you, happen frequently, last longer, or show up with other symptoms.

Here are situations that are generally reasonable to bring up with a healthcare professional soon (even if you feel okay right now):

Palpitations can also feel worse when you are more “tuned in” to your body. That does not mean the symptom is imagined, it means the nervous system is amplifying perception.

What you can do in the moment

If you are having palpitations right now and you feel otherwise well, start with basics.

Sit down, slow your breathing, and take a few sips of water.

Then try to observe what is happening rather than fighting it. Is it fast and steady, or irregular and jumpy? Did it start after caffeine, a stressful moment, or standing up quickly?

Pro Tip: If you can, check your pulse at the wrist or neck and write down what you notice, including the time it started and what you were doing. That information can be more useful to a clinician than trying to recreate the feeling later.

Some people are taught specific maneuvers (often called vagal maneuvers) for certain fast rhythms. These should be learned from a healthcare professional first, because technique and safety depend on your situation.

If you use a smartwatch or phone ECG feature, it can sometimes capture a rhythm strip during symptoms. Treat it as supportive information, not a final answer.

When to seek urgent care

Some palpitations are an Acute Safety Problem.

Important: Get emergency help right away if palpitations come with chest pain or pressure, fainting or near fainting, severe shortness of breath, new confusion, or sudden weakness on one side of the body.

Also seek urgent evaluation if your heart rate feels very fast and does not settle with rest, or if you have a known history of dangerous arrhythmias.

If you are unsure, it is generally safer to be assessed promptly. Arrhythmias can be intermittent, and early evaluation improves the chance of capturing what is happening.

How clinicians figure out the cause

A good workup is often straightforward.

A clinician will usually start with a history and physical exam, then an electrocardiogram (ECG). If the palpitations are not happening during the visit, you may be offered a wearable monitor for a period of time to catch an episode.

Blood tests are sometimes used to look for contributors like thyroid problems, anemia, or electrolyte issues. If symptoms suggest a structural heart issue, an echocardiogram (ultrasound of the heart) may be considered.

You may also be asked about sleep, alcohol, caffeine, supplements, and training routines. Even details that seem unrelated can matter, including recent injuries or changes in activity patterns. For example, a big change in exercise load, recovery, or even Gait Mechanics after an injury can affect stress, sleep, and stimulant use, which can indirectly influence palpitations.

Sometimes the outcome is reassuring, such as benign extra beats plus lifestyle triggers. Other times, treatment focuses on the underlying cause or on controlling an arrhythmia.

Key takeaways