My port is only sensitive when the seat belt is over it but I countered that with a sheepskin seatbelt cover so now I have no dramas,.
It never gave me a problem during Chemo & although I have emla patches to numb it before its accessed I have on 1 occasion had to have it accessed spur of the moment without one & cant say it hurt any more than a regular blood test.
My Port is still in a year after finishing Chemo & will stay in as long as I am allowed to keep it. This is my choice as I cant have bloods taken on the left due to lymphadema risk & my right side veins are trashed from having first Chemo that way. The port is so much easier for everything.