vivisection asks then!! how do u think he feels abt them? physical discomfort/issues included! do the other strawhats know anything about it? if they do, when/how?
he's def ashamed of it, it's a constant reminder of where he came from and why he was hated there! even if his feelings about germa have evolved over time from wanting to be like his siblings and win judge's love to realizing "wait, that shit was fucked up and i shouldn't aspire to any of it" it still undoubtedly has scarred him for life (literally!!!)
it's also a physical representation of his weakness, if he was just stronger he could've avoided all of it, right? obviously that's not the case, he was a child, he was strapped down to a table as grown adults cut him open and dug around inside him to fix something that should have never been seen as a problem in the first place. but sanji is very much the type of guy to blame himself for shit given how his childhood was! even if he logically knows all of this he would still have the feeling that it's his fault since he was told for so long that he is the issue, he s weak and all of that is why he suffers
i think he hides it (and the other scars i hc him as having, like stuff from his brothers' abuse and also a branding since i'm a sucker for that too) with his suits, only taking them off when bathing, having a swim shirt at the ready if they have some down time. he can't let the others know he was that weak, he can't let them see it and ask questions that might lead them to finding anything out about germa
and in terms of physical discomfort he'd def have chronic pain issues with it, you don't get cut open a bunch during your childhood and walk away fine! from my own experience with/knowledge of scars and chronic pain i'd imagine it acts up more during storms and when it's humid or cold and whatnot, the weather irritates the scar tissue. i think he'd be decent at just powering through it, he has a lot of experience with that during his childhood, after all. i think there could def be times where it gets too much and he can't deal, either not being able to get up in the morning at all or collapsing while forcing himself to keep working. chopper is def putting a stop to that shit asap when he joins
as for the other strawhats knowing, i said in the comments of my first post about it being chopper since he and kureha did surgery on his back on drum island (and don't get me started on how he'd feel about that, his body being violated in that way once again, even if it was in order to save his life. i loveee medical trauma sanji!) for everyone else i'm undecided but i have fics in the work about a few scenarios i've imagined!
thx for all the asks about this btw! i love yapping even if it's really tiring lol