Character name: Flynn Scifo
Age (of physical body): 22
General health: Ridiculously healthy. It's absurd.
Any physical disabilities or medical conditions?: He's currently running himself a little ragged. Chronic anxiety & resulting insomnia mean he doesn't get as much sleep as he should, and he has a bad habit of pushing through training injuries when he shouldn't, so he's got some muscle tearing that he really should deal with better. That seems to be an old habit.
Anything about their physiology that would be considered unusual by someone with a knowledge of human anatomy?: Nope! Flynn's a bog-standard human being.
Would you prefer to play out or hand wave the examination? We can handwave it!
Anything else I should know?: Flynn is, 1, absolutely covered in scars, particularly a large nasty one over his heart that looks like a blast wound healed over badly and a lot of smaller ones that look like sword wounds and bite / claw marks,

and 2, as healthy as he is now, it's pretty clear from skeletal stuff that he was a malnourished kid for a while.