In my understanding acupuncture procedures could be causing it. These are my personal experiences: In 2010 I was doing lots at acupuncture treatments (every 5 days for 6 month) hoping to unblock the meridian that goes from the injured foot (left) into the head causing PD tremors, stiffness. I read about the meridians and stuff in the research on PD recovery. My case is exactly that the research was describing - first left foot injury that never healed properly and then PD diagnose. At the time PD was left-sided and not medicated.
The needles inserted during acupuncture sessions were moving life energy chi around, adjusting yin and yang. Sometimes I couldn't move the left leg, sometimes the left arm. It took a while for the therapist to fine-tune the position of the needles. The outcome of acupuncture therapy was not clear-cut. Positive: I regained lost sensation in the left foot and started to move left toes again, inserted correctly needles were completely stopping tremors like the switch was turning them off. Negative: due to inserted in the wrong places needles right side tremors have started for the first time in 2 years from dX in 2008. Eventually right-side tremors have stopped and right side is normal again. Personally I believe in acupuncture as an supplementary treatment to physiotherapy and exercises, I think lack of good exercise program back in 2010 didn't allow acupuncture treatment be more helpful for me.