Mine sometimes falls asleep and I always hope that it doesn't start snoring.
On the serious side: I recently started having severe pain in my right hip after sewing. Realized two things. I didn't sit centered in front of the needle and my chair had a tilt to the right. When I changed chair and position, all the pain stopped.
Have you thought about getting one of those blue bubble pillows with knobs? A friend of mine uses it and she loves it.