I m a 62-year-old male. For the past several months, six maybe, I ve had minor but chronic light-headedness or dizziness (is there a difference?). I notice this when I sit up, lie down or suddenly change my head elevation. It doesn t seem to occur when my head is stationary. My overall health is pretty good, although I do have longstanding environmental allergies. I recently had a physical and my doctor (new to me) didn t seem overly concerned but wasn t particularly enlightening either. So I guess I m seeking the online equivalent of a second opinion, which I realize isn t like getting an actual second opinion