Will it affect my other children? Some types of dystonia do run in families and may be caused by one of a number of different genes. However, even if a child has inherited a gene that causes dystonia, it does not mean they will necessarily develop dystonia. For instance, one gene that causes dystonia is known as DYT1. Even if someone has this gene, there is only around a 30% chance that they will develop dystonia and the degree to which they might be affected can vary widely. If you want to know more about the implications for your family, you can ask to be referred to a genetic counsellor.