Meniere’s disease is often responsible for episodes of vertigo that heighten in severity over a period of minutes, but last for several hours with a gradual improvement during another period of several hours. Vestibular neuronitis and episodes of labyrinthitis typically present with fairly abrupt onset vertigo (over a period of hours) with resolution of the acute phase over the next several days. Traumatic injuries or vascular infarction of the labyrinth cause a sudden onset of symptoms with a slow recovery from the acute phase over a period of days to weeks, often with residual effects over a period of 12 to 18 months.