tingling on the top of my foot

I partially ruptured my PTT on 3/31/05. I was casted,then wore an air cast and progressed to a lace up ankle brace.
I was still having pain and was seriously thinking about surgery, but opted to try physical therapy first.
After my fifth visit I noticed the top of my foot was constantly tingling (I liken it to putting the tip of your tongue on a 9 volt battery). I told my therapist about it and he has me doing some stretching which is very painful. I just finished my 11th visit and still am experiencing the tingling, but he said he isn’t worried about it. It isn’t his foot and I’m a little concerned. What do you think.