feelings such as lightheadedness, giddiness, depersonalization (the feeling that one is outside ones body), a sense of turning, spinning or rocking. Sometimes a sensation inside the head and other times related to problems with balance.
One cause of dizziness is overbreathing (hyperventilation) due to anxiety. The overbreathing also causes lightheadedness, a sense of unsteadiness and tingling around the mouth and fingertips. Relief can be gotten by breathing In and out of a paper bag (to increase the level of carbon dioxide in the blood).