Flat irons are a wonderful invention, and have become a beauty staple for most of us. However, it you have Parkinson’s disease it can be very dangerous to use one.  Depending on your level of dyskinesia, or other movement problems at the time, you can walk away with nasty burns on yourself or others; or just plain have a difficult time coordinating sectioning the hair ,combing it, getting it in between those two hot plates, and then dragging the iron over the hair that you have captured.