Heart Racing at Night

Evidence-informed content reviewed for accuracy and safety

When you lie down, you become more aware of your heartbeat because external stimulation drops. Anxiety triggers your sympathetic nervous system, releasing adrenaline that genuinely increases your heart rate. Caffeine, dehydration, and lying on your left side can also make your heartbeat more noticeable. The awareness itself can trigger more anxiety, creating a feedback loop.

What to Do Right Now

1Place your hand on your chest and breathe slowly. Physical contact activates a calming response.
2Splash cold water on your face or hold a cold cloth to your neck - this triggers the dive reflex and slows your heart.
3Lie on your back or right side if you were on your left.
4Remind yourself: anxiety-related heart racing, while uncomfortable, is not dangerous.

Try This: Vagal Breathing

1.Inhale gently for 4 seconds.
2.Exhale very slowly for 8 seconds through pursed lips.
3.The extended exhale stimulates your vagus nerve.
4.Continue for 2-3 minutes until your heart rate settles.

Longer-Term Fixes

Cut caffeine after noon and stay hydrated throughout the day.
Regular aerobic exercise (even walking) strengthens your heart and reduces resting heart rate.
If heart racing is frequent, new, or accompanied by chest pain or fainting, see a doctor to rule out cardiac causes.

Frequently Asked Questions

Can anxiety make your heart race at night?

Yes. Anxiety activates your fight-or-flight response, releasing adrenaline that increases heart rate. This is a normal stress response and is not harmful, though it feels alarming.

When should I see a doctor about nighttime heart racing?

See a doctor if episodes are frequent, last more than a few minutes, are accompanied by chest pain, shortness of breath, or fainting, or if this is a new symptom with no clear emotional trigger.

Struggling to sleep tonight?

Paula is an AI wellness companion available 24/7. Talk through what is keeping you awake - no appointments, no waitlists.

Paula is not a substitute for professional mental health care. If you are in crisis, please contact a licensed professional or crisis line.

Get Started Free

Struggling with heart racing at night? Talk to Paula for free.

Try Free