Dystonia causes muscles to contract involuntarily, resulting in an uncontrollable twisting of the affected body part. Symptoms can be mild or severe and may interfere with the performance of many day-to-day tasks.

Doctors divide dystonia into two broad categories, generalized or focal. If your symptoms begin during your youth, you could have a type of dystonia that’s inherited and the symptoms may eventually affect the entire body (generalized). Most cases of dystonia, however, occur in adults and tend to affect only one body part – often the neck, the face, or an arm (focal).

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