This situation came up on our last session:
Enemy casts spike growth into a staircase, making it so that everyone except rogue was in the area (he was way back). This became a problem as the rogue didn't want to move forward because he would've received damage, and was too far behind in order to see into the stairway. He was with full hp. he lost like 3-5 rounds of combat.
question is: did he do smart or stupid? should a character take some damage in order to participate into the combat and end it quicker?
PS: the rogue was in my control so I am not calling anyone else but me stupid. My main character Druid was tanking the situation and taking it like a boss.
PPS: I want to have a discussion about the topic generally as well.
That's how I see it, too. Even if you know with absolute certainty that you can survive something like that, it still takes a heroic effort to actually go through with it. It's the main reason why high-level fighters still bother to take the stairs, instead of always opting for the express route to the ground floor. Save the heroics for when it's absolutely necessary.It depends on the mindset of your group. Because, lets be honest. Your character isn't "taking damage," they're being injured and inflicting pain on themselves. It takes a lot for people to willingly hurt themselves so obviously. From a role playing perspective, I think that willingly hurting yourself in such a fasion is rather unusual. "Should I lose HP while running over to fight and drain resources" is a very meta-game way of thinking of things.

(Dungeons & Dragons)
Rulebook featuring "high magic" options, including a host of new spells.