Ricky Gervais has made jokes about that though. Cancer, Aids, Famine and the Holocaust.
He ain't funny though. He also ripped off a lot off Stewart Lee for his stand up
If he's being asked to head the ball too frequently - which isn't exactly his specialty - it could affect his ear and cause an infection. Especially if the ball hits him on the ear directly.
Which parts?
We already have shit in the country, and the game of Liverpool fills life with joy. Thanks