The blue nail theory has been a topic of conversation on TikTok, but what exactly is it? Ahead, an expert explains.

But more often than not, those assumptions are just smoke and mirrors. This tendency has roots in the “blue dot” theory—a concept explored by Mark Manson, author of The Subtle Art of Not ...

In the world of psychology and color theory, blue is often linked to feelings of calm, relaxation, and stability,' says Dr.