I think we're talking about different aspects of the scenes because I totally agree with you on all of this. :D (And I especially like "ZYL's gastritis is linked to his having fucked up and SW walking away like that" because I've never thought of that, but it's canon in the novel and now I can totally see that it's probably meant to be canon in the drama too!)

What I meant is that Zhao Yunlan minimizes his own pain to himself all the time, and here he's mostly saying out loud what he's already thinking anyway, while in the second scene he's more aware that this is probably not good but he downplays it for Shen Wei. (Not that he would worry about himself or anything like that ever, lol, but I feel like he at least has the awareness that this may be worse than he thought. While the stomach pain is genuinely no big deal in his mind, no matter how awful it feels.)

ETA: I'm comparing the ZYL scenes only, ITA about the comparison between the first one and the third one! :)