Sudden-onset<unk>  and associated nystagmus precipitated by head movements
Latency period <30s between provocative head position and onset of nystagmus
Intensity of nystagmus increases to a peak before slowly resolving
Duration of<unk>  and nystagmus ranges from 5–40s
Repeated head positioning causes<unk>  and nystagmus to fatigue and subside
Nystagmus reverses direction during the head down and head up portions of Dix-Hallpike
Nausea/vomiting common
Symptoms worse in the morning (symptoms fatigue as day goes on)
No associated hearing loss or tinnitus
MUST distinguish from central<unk>  (HINTS Exam, Cerebellar stroke)
Latency period <30s between provocative head position and onset of nystagmus
Intensity of nystagmus increases to a peak before slowly resolving
Duration of<unk>  and nystagmus ranges from 5–40s
Repeated head positioning causes<unk>  and nystagmus to fatigue and subside
Nystagmus reverses direction during the head down and head up portions of Dix-Hallpike
Benign paroxysmal positional vertigo
Vestibular/otologic
Vestibular neuritis
Benign paroxysmal positional vertigo 
Labyrinthitis
Traumatic 
Cluster headache
Infection