Dizziness is a term that is often used to describe 2 different symptoms: lightheadedness and vertigo.
Lightheadedness is a feeling that you might faint.
Vertigo is a feeling that you are spinning or moving, or that the world is spinning around you. See also: Vertigo-associated disorders
Lightheadedness - dizzy; Loss of balance; Vertigo
Most causes of dizziness are not serious, and they either quickly get better on their own or are easy to treat.