Before moving out of his hidden place, Dean spent, at least, two days meditating and nourishing his "Willpower". Occasionally, he would go out to find a more spacious place to do his forms (even though he didn't have a sword with him) and also train his Control.
Those two things were crucial to his quick recovery. They were quite tiring activities, but their effectiveness relied on his internal harm.
After pushing himself so much, his muscles were strained, his mind was tired, his joints and bones couldn't be worse, and finally, his reserves of "Willpower" were so low that he could already feel the sensation of the "Chaos" starting to intoxicate his body.
He was determined to do anything he could to avoid it, even train his two first Pillars with a half-broken body despite it being quite uncomfortable. Nevertheless, his determination wasn't enough to get rid of that fear of death.
The boy never thought so many times that he would die.
