The way you experience [pain] can change so much depending on your attitude.
If contemplation of other people's pain just increases distress, then I think we should see it in another way. If we don't center too much on ourselves, then [we] increase our courage and our determination to remedy the pain, not our distress. If we have unconditional compassion, then it increases our courage. So that's the difference, self-centered motivation versus altruistic motivation.
A big part of pain is the subjective reaction of trying to revolt against pain. If it's there, it's better to deal with it. Most of it is "I cannot stand it," and that component is enhancing pain so much.
Empathy is the faculty to resonate with the feelings of others. When we meet someone who is joyful, we smile. When we witness someone in pain, we suffer in resonance with his or her suffering.
Just be free, and at least you will go through adversity with a stronger mind, and therefore, you'll be less affected, and pain will affect you less.