Vertigo or Labyrinthitis is a very distressing condition. Why does someone who has suffered from labyrinthitis and vertigo for six months recover after one session of physiotherapy? When another three people with labyrinthitis also respond to treatment the author begins a medical journey that leads far from the textbook. This story reveals the intriguing mechanism of the joints of the upper neck, the effect of herpes viruses, and the influence of the secretive autonomic system. Eventually the trail goes to Massachusetts. Here a neuro-scientist is researching his theory for the role of the specialised and mysterious Vagus nerve in Chronic Fatigue Syndrome/Myalgic Encephalitis. Could the Vagus hold the key to both Labyrinthitis and CFS/ME?