In a study by Santa Clara University in California, researchers found that people who habitually keep secrets, especially about embarrassing or painful experiences, tend to suffer from

more colds
more fatigue
more aches and pains

And they have higher levels of depression and anxiety. Dishonesty produces unpleasant side-effects. Becoming more honest will make you feel better in general.

 

http://youmeworks.com/deephonesty.html