> if you tell someone their back pain is caused by repressed emotions, you get what happens in the article.

But...you would (or could?, or should?) never tell someone that, because how would you know? Maybe there is some link but to conclude that it could be the case is pretty silly.

So it's not like that's a stigma, it's just a statement not based in fact that evokes a strong reaction because you're telling someone why they're feeling a certain way when in reality you have no idea at all.