Does anybody else's foot fall asleep while using the bathroom?

I have irritable bowel syndrome, so I am constipated a lot. Whenever I go to the bathroom, my left foot falls asleep 3 to 6 times depending on how long I am in there. My right foot never falls asleep. I try readjusting myself in various different positions to try to get good circulation, but my left foot always falls asleep. I am tired of this. Is this even normal?