Lightheadedness is a common and typically unpleasant sensation of dizziness and/or a feeling that one may faint. The sensation of lightheadedness can be short-lived, prolonged, or, rarely, recurring.In addition to dizziness, the individual may feel as though his or her head is weightless.The individual may also feel as though the room is what causes the spinning or moving (vertigo) associated with lightheadedness.reatment for lightheadedness depends on the cause or underlying problem. Treatment may include drinking plenty of water or other fluids (unless the lightheadedness is the result of water intoxication in which case drinking water is quite dangerous).