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Summary. 1  Generally, most dizziness is caused by problems of the inner ear and is treatable. 2  Common causes of inner ear dizziness include benign paroxysmal positional vertigo (BPPV), migraine and inflammation of the inner ear balance apparatus called vestibular neuritis.
Another frequent cause of dizziness is reduced blood flow to your entire brain. This can be triggered by a common condition known as orthostatic hypotension or postural hypotension. The disorder is a form of low blood pressure that happens when you stand up from sitting or lying down.