The Vagus nerve rests very close to the surface in the area of your mouth and throat. Gargling, especially if you keep it up to the point of tears, stimulates the Vagus and activates your body’s rest and recover response. The deep breath you take when you finally empty your mouth adds an extra boost.
Give it a try:
Extend your gargle a little bit longer each day until you feel safe gargling to the point where your eyes begin to tear. When you reach your limit, empty your mouth. Enjoy your deep, spontaneous breath and the sense of calm that washes over you.