On the morning of February 11, 2011, shortly after finishing the first season of Game of Thrones, Emilia Clark was working out at a gym in Crouch End, North London, when she suddenly felt a sharp pain in her head that felt like rubber. The band snapped and created a huge amount of pressure on his head. He suffered a hemorrhagic stroke and a hemorrhage inside the brain, and he realized directly that something had gone wrong with his brain while trying to move his toes to see if he had lost the ability to move. He underwent surgery and was told that he had a small aneurysm on the other side of his brain, but they would not touch it because they thought it would remain dormant indefinitely. He made a painful recovery and despite feeling every single day that he was going to die, he went back to his life and filmed the second season of the show.
Unbeknownst to him, a swollen blood vessel had formed in his brain, which stopped the flow of blood to that part of his brain, which unfortunately died, and two years after the first surgery, after finishing filming his third season, Game of Thrones, He was told he needed another operation.
He had to have another surgery and knowing that a part of his brain was dead made him deeply depressed. He told CBS:
Second, I had a bit of a brain that actually died. If a part of your brain doesn’t get blood in it, it won’t work anymore. It’s like your short circuit. So, I had it and they didn’t know what it was. It was a deep paranoia, even from the first. I was like, ‘What if I have some short circuit in my brain and I can’t act anymore?’ Literally, this is the reason for my longevity.
The second operation failed due to a massive hemorrhage which woke him up screaming in pain, and they told him that they would have to go through their skull for his treatment and some part of his skull would be replaced with titanium, and they had to do it immediately.