My 14 year old son experiences dizziness when he stands, sometimes he says his tongue goes numb as well. I myself have low blood pressure as does my mother, his grandmother, but I do not experience the dizzy ness he experiences. This has been going on for the past year or so. At his last sports physical this summer, it was shrugged off as nothing, but I did know if there was something that was more proactive to prevent his dizziness episodes?