This of course does not take into account stretching due to a tic, the reason you probably found this article.
Is stretching a motor or vocal tic?
Is it a simple or complex tic?
This really depends on the person, as stretching can involve a large number of muscle groups.
A simple tic would be the stretching action specifically. It would become complex if this tic is carried out with another tic of a different nature, or goes beyond that of a simple stretching action.
Main article: The difference between simple and complex tics
What to look out for
The immediate risk is pulling a muscle, and repetitive stretching in one area. Tics often focus on one specific area of the body for prolonged periods of time.
It would be advisable to see a specialist if this tic runs the risk of injury.
Is this caused by Tourette syndrome?
Tics that last more than a year, and consist of at least two motor tics and one vocal tic, could be Tourette syndrome.
A diagnosis has to come from a medical professional.
Main article: The difference between Tourette and other tic disorders