I am an exceedingly healthy 47 year old female. Very athletic (I run and climb) and on no medications. I have had no recent trauma and have no psychiatric history. About two weeks ago, I began having pins and needles sensations all over my body from the top of my head to the tips of my toes. They occur randomly. Although they seem worse at night time,and particularly in my feet, they are also there through out the day and can occur any where on my body. I would describe them is pin pricks, no real clustering of the symptoms. Several years ago a I took Diamox experimentally to potentially reduce the effects of altitude sickness on a climb, it was a dismal failure and the symptoms I am experiencing now are very similar...except, I am not taking any medication. I have had no vomiting or diarrhea that would cause a change in my electrolytes. Any ideas???