If the sensation happens to be an itch or an ache, then, instead of changing position or putting it out of our mind, we go right into the sensation. In doing so, it can actually resolve. Stop and observe how you're breathing right now. Yoga emphasizes how to breathe correctly. We relax both while we're holding the posture and after the posture.
Relaxation is crucial for our well being as well as an important tool for pain relief.
If you're in pain and you tense up, you hurt more. Instead of automatically grabbing for a pill, in yoga we allow ourselves to feel the pain, and relax into it. In doing so, it starts to dissolve. Just about all medical programs for healing, whether for emotional, mental or physical problems, include rest. Rest is also a wonderful preventive tool, yet most of us don't know how to relax, or feel guilty when we do.