- Dizziness that patients complain from are rotational vertigo, sense of instability, ataxia of gait, disturbance of vision, loss of contact with surroundings, nausea, loss of memory, loss of confidence, epileptic convulsion and dizziness that is considered by medical staff are:1- Vertigo as a sense of feeling the environment moving when it does not persist in all positions, aggravated by head movement.2- Disequilibrium as a feeling of unsteadiness or insecurity without rotation, standing and walking are difficult.3- Light headedness as swimming, floating, giddy or swaying sensation in the head or in the room.Taking the history from a vertigo patient:*What the patient means by vertigo?-- Time of onset-Temporal pattern-Associated signs and symptoms '' tinnitus, hearing loss, headache, double vision, numbness and difficulty in swallowing''.- Precipitating, aggravating and relieving factors.- If episodic: sequence of events, activity at onset, aura, severity and amnesia.*Examination of the vertigo patient checking:Spontaneous nystagmus, positional nystagmus, optokinetic nystagmus, posture and balance control like romberg's test, blind walking, untenberger and barany's test, stimulation of labyrinth, caloric test '' cold, warm water '' and the rotational test.Etiology:*Spontaneous nystagmus:Posture and balance control is positive with nausea , vomiting , sweating and anxiety : harmonic vestibular sy with loss of hearing , tinnitus , vestibular neuronitis , meniere disease and with otologic origin and dysharmmonic vestibular sy , with numbness , double vision , dysarthria in brain stem infarct and with a neurological origin.Nonspontaneous nystagmus :Posture and balance negative with nausea, vomiting in GI disorders and internal medicine , sweating and trachycardia by chest pain in angina , M.I '' cardiology '' and anxiety in psychiatry.- Clinical differentiating of peripheral and central vestibular lesion should be done by separating harmonic and disharmonic vestibular syndrome.- Examination of the patient with vertigo '' laboratory and imaging''•Electronystagmography•Video-oculography•Audiometry•BAEP•CT•MRI - Common cause of vertigo '' all by image ''Peripheral: Physiological '' motion sickness'', benign paroxysmal positional vertigo , vestibular neuronitis , labyrinthitis , meniere disease , perilymph fistula.Central: Brain stem TIA/infarct , post. fossa tumors , M.sclerosis, syringobulbia ,Arnold -chiari , temporal lobe epilepsy and basilar migraine.Others: Cardiac , GI , psycogenic , mediacations , anemia and hypotension , toxin and drugs:''aminoglycoside antibiotics,anticonvulsants,salycilates , alcohol , sedatives , antihistamins , antidepressants '' , cervical spondylosis , sensory deprivation ''neuropathy , visual impairment '',anemia , hypoglycemia , orthostatic hypotension and hyperventilation.