The Science Behind Why We Feel Butterflies in Our Stomach

Butterflies swirling around your stomach.

That fluttery feeling in your stomach before a big event isn’t just in your head—it’s your body’s fight-or-flight response in action.

When you’re anxious or excited, your brain signals your body to redirect blood flow away from your digestive system to prepare for action. This causes the stomach’s muscles to tighten, creating that weird “butterflies” sensation.

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