When the nervous system is stuck in fight-or-flight, the body stays on high alert, leading to chronic stress, fatigue, anxiety, and difficulty calming down. This state is often linked to vagus nerve compression symptoms such as tight neck muscles, shallow breathing, digestive discomfort, and heart rate changes. Using a vagus nerve stimulator may help regulate the nervous system by stimulating the vagus nerve, encouraging the body to shift out of survival mode and return to a more balanced, relaxed state.