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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.
Dizziness has many possible causes, including inner ear disturbance, motion sickness and medication effects. Sometimes it's caused by an underlying health condition, such as poor circulation, infection or injury. The way dizziness makes you feel and your triggers provide clues for possible causes. A viral infection of the vestibular nerve, called vestibular neuritis, can cause intense, constant vertigo. 2  If you also have sudden hearing loss, you may have labyrinthitis. 3  Meniere's disease. 4  This disease involves the excessive buildup of fluid in your inner ear.