Watch the reaction (disliking/resistance/pushing away) in the mind. We are not observing the experience to make the pain go away.
Why do we watch the reaction to the pain?
We watch our disliking of the pain to understand how the mind’s experience of pain changes with its reaction to the pain.
What to watch?
How does it feel when there is disliking? When the disliking increases, how does the pain feel? When the disliking decreases, how does the pain feel? When the disliking disappears, how does the pain feel?
As the state of the disliking changes, we’ll find that our view of the pain changes. And, that is important to see.
We can only understand the true nature of what pain is and who is in pain when there is no more disliking in the mind to the pain.