What Is The Vagus Nerve And How Does It Work?

Stimulating the vagus nerve with electricity can relieve depression and PTSD, studies show. Influencers say that you can relieve stress by resetting it through special stretches, including humming or even plunging your face into iced water. What is the Vagus Nerve, how does it work, and why are scientists cautious about TikTok’s vagus hacks? Watch to find out.