Yhh so basically if he had ems know will be saying he had a disease etcIt is because of the use of the sharingan. It's the price they pay, to say it like that, for having such a powerful eye technique. If you saw, at the five kage summit, Sasuke said that every cell of his body aches because of using so much of the power of the sharingan.
Let's call it some powerful side effects...Yhh so basically if he had ems know will be saying he had a disease etc
ohh i see nowLet's call it some powerful side effects...