I was diagnosed in 2001 and PD first affected the right side of my body and now it started to spread to the left side. And I recently began to experience painful left foot cramp after I walked for a short distance. But strangely enough I did not have such pain on my right foot. My neurologist said it is a kind of "task specific dystonia" as my symptom alleviated after medication. Do anyone of you have such experience? I used to walk a lot without taking medication and I wonder if there is any other therapy (other than taking medication) that could help. Appreciate your advices.