I have read in the literture that many pd's complain of cold hands. Myself I have been diagnosed for 6 1/2 years and been mainly involved on the left side. I often experience my left hand being colder than the right hand. One neuro doc said it could be that when my muscle are rigid (dystonia) that they could be squeezing the bood vessels more causing less blood flow to warm the hands. Just a theory from him. Anyone else heard of such?