“He has been played with to excess,” Tom told Entertainment Weekly in April. “You put a rubber hat on top of a rubber head again and again and again and again, something’s gonna chafe. So, yeah, he does have… let’s say a worn area on the back of his head.”
Article source: https://www.huffingtonpost.co.uk/entry/toy-story-5-tom-hanks-cyberbullying_uk_6a216bcbe4b0ba317306ee1b