If you've been on TikTok recently, you may have heard people referring to "glass child syndrome." But the term was actually first used in a TED Talk all the way back in 2010. "Glass child" refers to children who grow up in the shadows of their disabled or unwell sibling(s). Often these children come across as very mature and independent, but they may well struggle with issues such as perfectionism and being unable to set boundaries.
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