Dear Ms. Elkins,
Childhood tic disorder or transient tic disorder are not uncommon. They are characterized by tics that arise apparently 'out of the blue' and resolve without specialized treatment of any sort. They are not the precursors to any more serious condition.
As you perhaps know, a single motor tic is not sufficient to qualify for a diagnosis of Tourette's Disorder. There must be multiple motor tics and also vocal tic, though the particular behaviors can change over time (and usually do). Tourette's would require treatment via medication, and there are many options, often involving use of more than one medication.