i have similar and been researching all day.
Mine is on left leg about 4 or 5 inches above ankle on the outer calf, not around the back but on the side and towards the front where the calf meets the tibia.
It isnt painful as such but more of a spot i can feel, it doesnt stop me doing anything and i can run fine with it and walk afterwards with no sensation at all.
only when i run, i am using a new pair of the shoes i have always used, and it has bugged me about 6 months now in my older shoes and now my new ones.
I have had calf heart attacks before but this is different
Edited: 15/01/2012 at 18:11