What is the vagus nerve?

The vagus is a long, wandering nerve that spends most of its time updating your brain on the goings-on of your body—in particular, your gut, where battles with bugs are continually raging. It's a pretty stressful round-the-clock job, and the vagus has a tendency to overreact when things get hectic. A stressed-out vagus signals your immune system to attack just about everything it can find. And all that unnecessary fighting is not good for your health.

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Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.