Feeling lightheaded or dizzy occasionally is not uncommon and usually isn’t serious. If, however, these spells are becoming more frequent, severe, sudden, or prolonged, it may warrant further investigation and testing by a doctor. The issue may be due to an underlying medical problem, such as poor circulation or a heart condition. Feeling lightheaded or experiencing other sensations associated with dizziness – such as feeling faint, unsteady, off-balance, floating, or a spinning sensation – ... [Read More]