Pulsing throbbing in my left leg.  Feels like I can feel the blood flowing through my leg, like a vibration is passing through my veins from the top of my leg to the bottom.  It started a few days ago after I exercised maybe too much without stretching beforehand and that same day I slept on a "too small" couch with my legs uncomfortably positioned all night... but it's been a few days now and for a sporty healthy person like me, with healthy eating habits... well, this is highly disturbing.  Several days now of this non stop feeling...I hope this is not a permanent condition.  Is anyone experiencing this for a really long time?