Involuntary movements can also be seen in peripheral neuropathies of diabetes, in hyperthyroidism, parasomnia (sleep disorders), multiple sclerosis, TIAs or transient ischemic attacks or mini strokes, hypoglycemia, disorders of
calcium metabolism, hyperparathyroidism etc. Certain epilepsies too could be the cause. Consult an internal medicine specialist or your PCP. Discuss these possibilities with your doctor. A comprehensive investigation is required keeping all the points in mind.