I lowkey headcannon Jason Todd would have some sort of genetic issues after the Lazarus Pit, like EDS (Ehlers Danlos Syndrome).
Like due to the Lazarus Pit and being resurrected from the dead it causes issues such as connective tissue weakness. With how the Pit works, yes, it resurrects. But, also destabilizes and overstimulates the body. Collagen is one of the things that can easily regenerate wrong under chaotic conditions.
Like he just shows EDS signs like: His joints don’t quite sit right in their sockets, his ligaments healed too loose, his muscles work overtime to compensate the resurrection. Increased chronic pain since his return and not mention just the trapped pain and stress within his body causing physical manifestation. It fits the canon idea that he’s “not the same” physically, not just mentally.
I think Jason already shows signs that fit an EDS-coded character: Hypermobile joints, Frequent dislocations, Chronic pain, Fatigue. His body coming back “wrong” (for lack of a better term) gives him: Wrists that slip, knees that give out sometimes, a rib subluxation if he twists too hard, constant bruising he hides under clothes
It also adds depth to his rage and resilience A Jason who lives with EDS: Fights through pain because he refuses to feel weak again, pushes his body past limits because he survived worse (AKA the Joker and his death) Rewraps his joints or tapes his knees before missions, trains harder, not smarter, because he thinks rest is equivalent to laziness. And honestly? It fits the bittersweet tragedy that always follows him.
It explains why he relies on armor and tech more than raw acrobatics. Hypermobile joints + chronic pain = Jason modifies his fighting style without ever admitting why. Prefer guns over long-range parkour, wearing reinforced braces under the suit, taped fingers, might even have custom boots for ankle stability.
Just him navigating flare-ups in a body that doesn’t feel like his own having sprung from a boy to a man, practically overnight for him. And just how it affects him. Maybe I’m reaching but this has been my own personal headcannon for him forever.
