1)      Benign Paroxysmal Positional Vertigo – BPPV – vertigo precipitated by head movements, turning over in bed, sitting or lying down, extending the neck, vertigo accompanied by nausea and vomiting and rarely diarrhea, brief episodes of vertigo, rotatory nystagmus, brief nystagmus usually lasting 40 secs, nystagmus co-occur with vertigo, Dix-Hallpike testing positive, repeated testing causes attenuation of vertigo and nystagmus, the latency of several seconds for vertigo and nystagmus with provocative positioning,