unhealthy so4 and social anxiety: how common is it?

I was wondering how social anxiety emerges from this specific kind of ego structure. asking mostly because I've suffered from it my whole life to a very severe extent, so I imagine it says a lot about my own ego structure. Caring about what people think has been attributed a lot to attachment types because of their need to adapt, more than it has been attributed to the social instinct I think. I don't know, what are your thoughts?