If you've ever had to keep a big secret, you're probably familiar with the toll it can take on your mental health. All that worrying about who you might hurt if the secret gets out, and the pressure of keeping it to yourself in the first place, is enough to get to the most discreet person. Not all secrets are created equal, however, and some are more damaging to our quality of life than others.
Intrigued? Check out this gallery to learn all about the psychological effects of keeping secrets.