If you search for ‘vagus nerve’ on TikTok you will most likely encounter video upon video of how to stimulate, ice, and reset your vagus nerve. The vagus nerve has a big effect on how we are feeling and our health. Like anything, our understanding of the vagus nerve and understanding of the body is always getting better and always improving. View this post on Instagram A post shared by Níall Ó Murchú (@breathewithniall)Does the vagus nerve play a role in the gut-brain axis? I believe it (the vagus nerve) is one of the main pathways between our brain and the gut.