Uh...they say it takes time.

[Sena blinks oddly, like he's not completely focused.]

Like...it looks like you get better but you're not and if you get hit again while concussed you like. Die instantly.

[Yep. You can definitely tell he's a little out of it if he's saying something like this so nonchalantly...and with accompanying hand motions and sound effects. Boosh.]

So I'm supposed to rest until the headaches are gone or something like that?