Think you or someone you know has dystonia? Dr. Oz says 90 percent of people with this brain disorder are misdiagnosed at first...so ask for a second opinion.

"Dystonias manifest themselves in many different ways," he says. "Now, I don't want everyone going out there thinking they have dystonia, but a lot of people who get writer's cramp, especially right after you start writing, it's not just because you're using your hand. That's actually a focal dystonia."

Rogers says there may be thousands of undiagnosed people around the world.