I never had radiation but had extensive surgery...I have that numb feeling on top but painful inside...I consider it like a freezing feeling...I seem to be getting more and more feeling back...I am only four months since surgery though have been told another 3-6 months yet before normal...I am also diabetic which hinders the healing process...I don't know if this helps but we are all I think in our own way trying to find out what is normal and what isn't and I keep trying to pry into my brain that there are limited normal healing roads as every person's body reacts different to treatment...just because it isn't normal doesn't mean it is bad but most doctors have seen most of the variables and can differentiate between something and nothing...