Thank you for posting your query at DoctorSpring.com
I have noted your symptoms and agree with your psychiatrist that it is a form of dyskinesia or dystonia. Dystonia is an abnormal involuntary movement disorder, where they may be pain along with abnormal postures/movements.
Evaluation needs to be done to determine the cause. Medications used for psychiatric illness could also be a cause. In addition, MRI of brain and spine should be done.
A trial of levodopa tablets should be given to see if the problem in foot improves.
Other medications that could help are trihexiphenidyl and clonazepam tablets.
In some cases, botox injections are also helpful.
Feel free to discuss further,
Dr. Sudhir Kumar MD (Medicine), DM (Neurology)
Senior Consultant Neurologist