Symptoms: *Paroxysmal—appears suddenly, and in episodes of short duration: lasts only seconds to minutes<unk> —is induced by a change in position, even slight *Vertigo—a spinning dizziness, which must have a rotational component *Torsional nystagmus—a diagnostic symptom where the top of the eye rotates toward the affected ear in a beating or twitching fashion, which has a latency and can be fatigued (vertigo should lessen with deliberate repetition of the provoking maneuver): nystagmus should only last for 30 seconds to one minute *Pre-syncope—(feeling faint) or syncope (fainting) is unusual, but possible *Visual disturbance—due to associated nystagmus, making it difficult to read or see during an attack *Nausea—is often associated *Vomiting—is common, depending on the strength of vertigo itself and the causes for this illness Many people will report a history of vertigo as a result of fast head movements. Many are also capable of describing the exact head movements that provoke their vertigo. Purely horizontal nystagmus and symptoms of vertigo lasting more than one minute can also indicate<unk>  occurring in the horizontal semicircular canal. The spinning sensation experienced from<unk>  is usually triggered by movement of the head, will have a sudden onset, and can last anywhere from a few seconds to several minutes. The most common movements people report triggering a spinning sensation are tilting their heads upward in order to look at something and when rolling over in bed. People with<unk>  do not experience other neurological deficits such as numbness or weakness. If those symptoms are present, a more serious etiology, such as posterior circulation stroke or ischemia, must be considered.
Benign paroxysmal positional vertigo
Stroke
Migraine-associated vertigo
Ménière's disease
Benign paroxysmal vertigo of childhood
Labyrinthitis
Alternobaric vertigo
Flicker vertigo