What It Feels Like

Your heart pounds, flutters, or seems to skip beats. You might call these feelings palpitations. Although they can feel scary, most aren't serious and rarely need treatment. Knowing what makes your heart race can help you not panic when it happens and know when to call your doctor.

What It Feels Like

Your heart pounds, flutters, or seems to skip beats. You might call these feelings palpitations. Although they can feel scary, most aren't serious and rarely need treatment. Knowing what makes your heart race can help you not panic when it happens and know when to call your doctor.

Exercise

Working out is good for you. And a brisk run or intense indoor cycling class will naturally make your heart beat faster. That helps your heart pump more blood to power your muscles through the workout. If your heart flutters or pounds, it could be because you haven't worked out in a while and you're out of condition. An irregular heartbeat, or arrhythmia, can also cause palpitations when you exercise.

Caffeine

Does your heart beat faster after your morning latte? Caffeine is a stimulant that raises your heart rate, whehther you get it from coffee, soda, an energy drink, tea, chocolate, or another source. One study found that caffeine from coffee, tea, and chocolate isn’t likely to cause palpitations in people with healthy hearts. But experts don't know whether it might trigger them in people with heart rhythm problems. 

Nicotine

The addictive chemical in cigarettes and other tobacco products, nicotine raises your blood pressure and speeds up your heart rate. Quitting smoking is one of the best things you can do for your heart, though it might not slow your heartbeat right away. Patches and other nicotine replacement products can make your heart race. Palpitations can also be a symptom of nicotine withdrawal, but they should stop within 3 to 4 weeks after you quit.

Hormone Changes

Women might notice that their heartbeat speeds up when they have their period, they're pregnant, they’re close to menopause, or they're in menopause. The reason: hormone levels. The boost in heart rate is usually temporary and no reason for worry. If you're pregnant, palpitations can also happen if you're anemic, which means you don’t have enough red blood cells that carry oxygen throughout your body.  

Hormone Changes

Women might notice that their heartbeat speeds up when they have their period, they're pregnant, they’re close to menopause, or they're in menopause. The reason: hormone levels. The boost in heart rate is usually temporary and no reason for worry. If you're pregnant, palpitations can also happen if you're anemic, which means you don’t have enough red blood cells that carry oxygen throughout your body.  

Medicines

Some prescription and over-the-counter medicines cause palpitations as a side effect, including:

• Antibiotics
• Antifungal medicines
• Antipsychotic drugs
• Asthma inhalers
• Cough and cold medicines
• Diet pills
• High blood pressure medicines
• Thyroid pills

If you take one or more of these types of meds, ask your doctor if it could affect your heartbeat. Don't skip any doses before you check with your doctor.

Low Blood Sugar

Have you ever noticed that you feel shaky, cranky, and weak when you've skipped a meal? It can also lead to palpitations. When your blood sugar level drops, your body releases stress hormones like adrenaline to prepare for an emergency food shortage. Adrenaline speeds up your heart rate.

Overactive Thyroid Gland

Your thyroid is a butterfly-shaped gland in your neck. It makes hormones that help manage your metabolism and other things. An overactive thyroid (called hyperthyroidism) can make too much thyroid hormone. That can speed up your heart so much that you feel it beating in your chest. Taking too much thyroid hormone to treat an underactive thyroid gland (called hypothyroidism) can also rev up your heartbeat.

Heart Rhythm Problems

Sometimes an irregular heart rhythm, called an arrhythmia, causes palpitations.

• Atrial fibrillation, or AFib, happens when the heart's upper chambers, called the atria, flutter instead of beating normally.
• Supraventricular tachycardia is an abnormally fast heartbeat that starts in the heart's upper chambers.
• Ventricular tachycardia is a fast heart rate due to faulty signals in the heart's lower pumping chambers, called the ventricles.

Alcohol

If you drink a lot, or just have more than usual, you might feel your heart beating faster or fluttering. It often happens on holidays or weekends, when people drink more, earning it the nickname of "holiday heart syndrome.” But for some people, it can happen even when they only drink a little bit.

Premature Ventricular Contractions

Premature ventricular contractions (PVCs) are extra heartbeats. They happen when your heart's ventricles squeeze too soon. The extra beat throws off your heart's normal rhythm and makes it flutter, pound, or jump in your chest. If your heart is healthy, occasional PVCs are nothing to worry about. But you might need treatment if you have heart disease and you get these extra beats often.