Go through these in order and stop at the first one that applies. If you are reading this for someone else, answer for them.
Do not stop a prescribed medicine without advice unless emergency services tell you to do so.
Call emergency services for loss of consciousness, serious injury, difficulty breathing, or a prolonged episode with no normal recovery.
Typical tics do not usually cause these symptoms.
And for anyone, someone who:
Get urgent medical help if abnormal movements occur with new weakness, severe confusion, a high fever, or a marked change in awareness.
These features are not typical of provisional tic disorder and may have another cause.
Arrange a routine medical assessment if repeated movements or sounds are new, have no clear explanation, or continue over time.
An assessment is also appropriate if symptoms cause pain, disrupt sleep or school, lead to bullying, or create significant distress.
The article also says
Seek earlier advice if symptoms began after starting or changing a medicine, or if the movements are unusual for a tic.
Every sign above is quoted from the sofidex article on Provisional tic disorder. If you are not sure, err upward — it is always reasonable to be checked.