Hi,
You can take an active role, when the thought comes to mind, of, " Am I healing, or is this a bad discomfort I am feeling." First of all, your mind has popped into the equation, and one need's to be diligent and aware of how you work with that. Both the trust Iam2 mentions, and the common sense that AgentB closed with, is certainly good advice, and involved.
When that thought comes to mind, a negative that can occur, is doubt. It is as significant, as fear or anger, as a negative emotion. Also, manifesting is in play. Where are you leading this, at the 'moment', this comes up. What are you going to create.
When I first heard Master Lin talk about this common side effect of feeling some discomfort, which is the the qi working to clear the blockage, he said to put an image of the sun in it, and see it , experience it, support it, as healing in process. It is very different, to create this, as opposed to doubt. The first manifests and supports healing, the latter, stalls it, or supports the existing blockage.
Trust is definitely part of that, as Iam2 mentioned, and is counting on an outcome, to a degree, or a more passive, very positive energy. I like the idea of taking action, and manifesting, along with that trust. It immediately cuts out the doubt, or the negative activity of the mind coming in and working against you. The sun, is a very powerful image, and east to focus on, immediately, and stop the thoughts. I learned , from another teacher I had, and I believe this, that if the thought doesn't complete, it doesn't manifest anything. Letting go of a thought midstream, is a valuable experience of spiritual will, awareness, and ability to keep the mind in its place. Give it the sun to focus on, and your sense of healing to support. You move in one direction this way towards healing.
Again, as Agent B said, you listen to your body, and use common sense. Even with this possibilty, of your higher self telling you to perhaps consult with a physician, you can keep your mind out of it, in the negative sense. You can discern, and still be on a positive path to healing. You can back off the movement, say, but still sit down and create the positive image and direction to your experience and work, only manifesting, or seeing, yourself moving in towards healing. If you see a doctor, it becomes a teamwork thing, not a defeat or setback. This is great work, involving one's spirit overruling the mind's chatter or doubts that come up. It is another aspect in this process, that is extremely beneficial to be aware of and exercise.
love,
gallen
(Agent B, welcome back from your travels..)