What Causes Tingling Feeling In Feets?

I am in a-fib, have a pacemaker and am taking several medications. I have occasional tingling in both of my feet when I go to bed. For the past few days I've had almost tingling on the outside upper potion of my left foot. This is where the most promounced tingling occurs in the evening as well. Might this be related to a-fib and is it dangerous?