imo I think the reason for these scars appearing is cuz he is getting himself too involved which makes him truly be in the incident, unlike before where he was sort of aware that it was all acting.
it sounds obvious but maybe it's that simple? idk its prolly alot more complex that what I'm thinking(〜 ̄△ ̄)〜
Although it may be deeper, this is still a really good theory
imo I think the reason for these scars appearing is cuz he is getting himself too involved which makes him truly be in the incident, unlike before where he was sort of aware that it was all acting.