Lip-biting is a tic that is painfully easy to carry out, yet may go unnoticed by others. It can involve biting the lip as a whole, or picking at the skin. It is different to skin-picking compulsions in other disorders, and when triggered by anxiety, boredom or stimming.
Is lip-biting a motor or vocal tic?
Would this be a simple or complex tic?
This is a simple tic.
Like every tic, there is a chance that this is incorporated into a larger sequence of tics (such as humming or head nodding) simultaneously. Additional movements- or the use of additional muscle groups- would be an example of a complex tic.
Main article: The difference between simple and complex tics
What to look out for
Is this a sign of Tourette syndrome?
If lip biting has occurred for more than one year, and accompanied by at least one other motor tic and one vocal tic for the same duration, it could be Tourette syndrome.
A diagnosis can only be provided by a specialist, as symptoms may be of a separate condition altogether.
Main article: The difference between Tourette and other tic disorders