HI Well come to HCM Thank for asking a question Your concern being appreciated, lighthead symptoms may have several causes but the most common is hypoglycemia, cerebral ischemia, labyrinthitis, some time may be undetected hypertension, and others, have some rest, eat something, if you are hypertensive then check the blood pressure, and in case of diabetes get done the plasma glucose level, Only advise I would give you is to try Betahistine till you see your doctor, but is nothing to worry, if the symptoms are not severe else you have to see the ER just to rule out the cerebrovascular condition hope this information helps.