One of the benefits of a hug is lower blood pressure and heart rate, not to mention an elevated level in our "happiness" factor. :)
Sometimes when you can't find the right words, sometimes a simple hug can erase tension away. When words aren't enough, sometimes a hug is the only thing that will suffice.
So go ahead and hug the ones you are close to and those that you think need a hug. Make a difference in someone's day. It is so easy to do!