I think first we have to realize that the old saying, Truth Hurts, is very true.
The truth forces each of us to look at ourselves as fallible, that in itself, can hurt.
The next thing we have to realize, is that people who tell us the truth, really love us enough to be honest with us. We have to choose how we accept that kind of love.
Jesus is our prime example of truthfulness, He never beat around the bush, just to make people feel better. Take it or leave it, Jesus was and is truth.
The thing that hurts the most about truth, is that it forces us to look in the mirror of our life, and make an honest assessment about ourselves. This is the most hurting aspect of truth, the self-assessment. Where we go after this assessment, depends on us.
Jesus dealt in truth as the best policy, as Christians, this world would be a lot different if we dealt in truth, instead of what we think people want to hear.