Heart Palpitations Causes: Understanding Why Your Heart Races, Flutters, or Skips a Beat

What Are Heart Palpitations?

Heart palpitations are the sensation of feeling your own heartbeat. They may feel like your heart is racing, pounding, fluttering in your chest, or skipping beats. You might notice these sensations in your chest, throat, or neck. While experiencing palpitations can be alarming, the good news is that most palpitations are harmless and do not indicate a serious heart condition.

According to medical research, palpitations are one of the most common reasons people seek cardiac evaluation, though in up to 16 percent of cases, no underlying cause can be identified.¹ The sensation occurs when you become aware of your heart's rhythm, which normally goes unnoticed.

Common Causes of Heart Palpitations

Many everyday factors can trigger heart palpitations. Understanding these common causes can help you identify potential triggers in your own life.

Stress and Anxiety

Perhaps the most common cause of palpitations, anxiety and chronic stress can significantly affect your heart rhythm. When you experience stress, your body releases adrenaline and other stress hormones that increase your heart rate and can make you more aware of your heartbeat. Studies show that psychiatric disorders, including anxiety, account for approximately 31% of palpitation cases.²

Stimulants

• Caffeine: Coffee, tea, energy drinks, and chocolate contain caffeine, which can increase heart rate

• Nicotine: Smoking or using tobacco products stimulates the cardiovascular system

• Alcohol: While often perceived as relaxing, alcohol can trigger irregular heartbeats

• Certain medications: Decongestants, asthma inhalers, and some cold medications contain stimulants

Physical Factors

• Dehydration: When your body lacks adequate fluids, your heart must work harder to pump blood

• Lack of sleep: Insomnia and poor sleep quality can contribute to palpitations

• Strenuous exercise: Intense physical activity naturally increases heart rate, though you may notice this more after workouts

Medical Conditions That Can Cause Palpitations

While most palpitations are benign, certain medical conditions can cause irregular heartbeats that require attention.

Thyroid Disorders

Hyperthyroidism, or an overactive thyroid, is a well-known cause of heart palpitations. Research indicates that 10% to 20% of patients with hyperthyroidism develop atrial fibrillation, which can lead to palpitations.³ Thyroid hormones directly affect the cardiovascular system, and when thyroid levels are too high, the heart may beat faster or irregularly.

Anemia

When you have anemia, your blood carries less oxygen, forcing your heart to pump more blood to compensate. This increased workload can cause palpitations, particularly during physical activity.

Electrolyte Imbalances

Minerals like potassium, calcium, and magnesium play crucial roles in regulating heart rhythm. Imbalances in these electrolytes, which can result from dehydration, certain medications, or kidney problems, may trigger palpitations.

Arrhythmias and Heart Conditions

Cardiac arrhythmias are irregular heart rhythms that can range from benign to serious. According to the CDC, arrhythmias cause fluttering feelings in the chest and can include conditions like atrial fibrillation, which increases stroke risk.⁴ Other cardiac conditions that may cause palpitations include:

• Cardiomyopathy (disease of the heart muscle)

• Valvular heart disease

• Coronary artery disease

• Congenital heart conditions

Hormonal Causes: Menstruation, Pregnancy, and Menopause

Hormonal fluctuations can significantly impact heart rhythm, and palpitations are common during various phases of reproductive life.

Menstrual Cycle

Many women experience palpitations during the luteal phase of their menstrual cycle (the two weeks before menstruation). The hormonal shifts during this time can make the heart more sensitive to stress hormones.

Pregnancy

Palpitations during pregnancy are quite common and are usually benign. The body undergoes significant cardiovascular changes during pregnancy, including increased blood volume and heart rate, which can lead to noticeable heartbeats. However, pregnant women with structural heart abnormalities may have increased risk of arrhythmias.⁵

Perimenopause and Menopause

During perimenopause and menopause, fluctuating and declining estrogen levels can trigger palpitations. Research suggests that perimenopausal palpitations seem related to increased sympathetic nervous system activity.¹ While typically harmless, these palpitations can be bothersome and may warrant discussion with a healthcare provider.

Lifestyle Factors and Triggers

Beyond the major causes, several lifestyle factors can trigger or worsen heart palpitations.

Dietary Triggers

• Spicy foods: May trigger palpitations in some individuals

• Heavy meals: Large meals can temporarily affect heart rhythm

• Energy drinks: Contain high levels of caffeine and other stimulants

• Alcohol: Can disrupt the heart's electrical signals

Recreational Substances

Illicit drugs, including cocaine, amphetamines, and cannabis, can cause significant cardiovascular effects including palpitations and dangerous arrhythmias.

Exercise Patterns

While moderate exercise supports heart health, intense workouts without proper hydration or in extreme heat can trigger palpitations. Conversely, a sedentary lifestyle may also contribute to palpitation susceptibility.

Sleep Deprivation

Poor sleep quality or insufficient sleep affects the autonomic nervous system, which controls heart rate. Keeping a symptom diary to track when palpitations occur can help identify personal triggers.

When Heart Palpitations Are Harmless

Most heart palpitations are benign, especially when they:

• Occur occasionally and last only a few seconds

• Happen during or after stress and resolve when stress decreases

• Are not accompanied by other symptoms

• Occur in people without underlying heart disease

Anxiety-related palpitations are particularly common and typically resolve when the underlying stress is addressed. Research shows that palpitations usually are not serious or harmful and often go away on their own.⁶

Managing Benign Palpitations

For harmless palpitations, simple techniques can help:

• Practice deep breathing or meditation

• Try vagal maneuvers (like bearing down or splashing cold water on your face)

• Reduce known triggers like caffeine or stress

• Stay well-hydrated

When to Worry: Warning Signs

While most palpitations are harmless, certain warning signs indicate you should seek medical attention immediately.

Seek Emergency Care (Call 911) If Palpitations Are Accompanied By:

• Chest pain or pressure: May indicate a heart attack or serious cardiac issue

• Severe shortness of breath: Could signal heart failure or pulmonary problems

• Dizziness or lightheadedness: Suggests blood pressure may be dropping

• Fainting or near-fainting: Indicates the heart may not be pumping effectively

• Confusion: May signal inadequate blood flow to the brain

• Duration longer than 30 seconds: Sustained palpitations warrant immediate evaluation

Schedule a Doctor's Visit If You Experience:

• Palpitations that are becoming more frequent or severe

• New palpitations if you have a history of heart disease

• Palpitations that occur with unusual sweating

• Regular palpitations without an identifiable cause

According to medical guidelines, people with structural heart disease face greater risks from cardiac arrhythmias than those without underlying heart conditions.²

How to Manage and Prevent Palpitations

Many palpitations can be reduced or prevented through lifestyle modifications.

Reduce Stimulant Intake

• Limit or eliminate caffeine from coffee, tea, and energy drinks

• Avoid or reduce alcohol consumption

• Quit smoking and avoid nicotine products

• Review medications with your doctor for potential stimulant effects

Stress Management

• Practice regular relaxation techniques such as deep breathing, meditation, or yoga

• Exercise regularly at moderate intensity

• Consider counseling or therapy for chronic anxiety

• Maintain a consistent sleep schedule

Stay Hydrated

Dehydration makes your heart work harder. Aim for adequate fluid intake throughout the day, especially during exercise or hot weather.

Vagal Maneuvers

These techniques stimulate the vagus nerve and can help slow a racing heart:

• Bear down as if having a bowel movement

• Place cold water or ice on your face

• Cough forcefully

• Hold your breath briefly

Keep a Symptom Diary

Tracking when palpitations occur, what you were doing, what you ate or drank, and how you were feeling can help identify patterns and triggers.

Conclusion

Heart palpitations are a common experience that can feel alarming but are usually harmless. Understanding the many potential causes of heart palpitations, from everyday factors like stress and caffeine to medical conditions like thyroid disorders and arrhythmias, can help you make informed decisions about your health. While occasional palpitations that resolve quickly typically do not require medical attention, it is important to recognize warning signs that warrant immediate care. If you experience palpitations with chest pain, shortness of breath, dizziness, or fainting, seek emergency medical attention. For persistent or concerning palpitations, consult your healthcare provider to determine the underlying cause and appropriate management.

References

1. Raviele A, et al. Management of patients with palpitations: a position paper from the European Heart Rhythm Association. Europace. 2011;13(7):920-934. doi:10.1093/europace/eur130

2. Weber BE, Kapoor WN. Evaluation and outcomes of patients with palpitations. Am J Med. 1996;100(2):138-148. doi:10.1016/s0002-9343(97)89451-0

3. National Institute of Diabetes and Digestive and Kidney Diseases. Hyperthyroidism (Overactive Thyroid). NIDDK.NIH.gov. Updated August 2021. Accessed February 2, 2026. https://www.niddk.nih.gov/health-information/endocrine-diseases/hyperthyroidism

4. Centers for Disease Control and Prevention. About Other Conditions Related to Heart Disease. CDC.gov. Updated 2024. Accessed February 2, 2026. https://www.cdc.gov/heart-disease/about/other-conditions-related-to-heart-disease.html

5. Baumgartner H, et al. Clinical approach to palpitations in pregnancy. Heart. 2025. doi:10.1136/heartjnl-2024-325200

6. Cleveland Clinic. Heart Palpitations: Symptoms, Causes & Treatment. ClevelandClinic.org. Updated 2024. Accessed February 2, 2026. https://my.clevelandclinic.org/health/diseases/17084-heart-palpitations

Medical Disclaimer: This article is for informational purposes only and does not constitute medical advice. Always consult a qualified healthcare provider for diagnosis and treatment recommendations. The information presented here should not be used as a substitute for professional medical advice, diagnosis, or treatment. If you have concerns about your health, please seek immediate medical attention.