is a neurological movement disorder
characterized by involuntary muscle contractions,which force certain parts of the body into abnormal,sometimes painful, movements or postures. Dystonia can affect any part of the body. Ayurveda offers panch karma and internal medicine in such cases. I would advice you to start with ashwagandha
and abhrak sahastraputi also massage
the area with prasarni tail. More details can be worked out after going through detailed history of patient.