Unexplained dysarthria and dystonia. Why?

Hard to say. If you were previously "normal" and now have these symptoms the problem could be in the brain. I would not wait to see if things get better...See your doctor asap.
Unknown. After through evaluation by neurologist, speech therapist, etc, some diseases take time to diagnose.

Related Questions

Unexplained dysarthria and dystonia. Where can I go or who to talk to for help?

?spastic dysphonia. (do you really mean dystonia, or is it dysphonia?) perhaps, start with otolaryngologist, and maybe, you would be a candidate for botox. Some neurologists deal with such issues, and there a scattered head and neck surgeons who specialize in voice rehab. Perhaps contact a nearby medical school and get referrals. Read more...