Go through these in order and stop at the first one that applies. If you are reading this for someone else, answer for them.
Seek emergency help for sudden weakness, facial drooping, trouble speaking, loss of consciousness, severe breathing difficulty, or a seizure lasting more than five minutes.
Also seek emergency help for repeated seizures without recovery between them.
Contact the surgical team urgently for a worsening severe headache, repeated vomiting, new confusion, fever, increasing redness or swelling, drainage from an incision, an opening wound, or visible hardware.
Mild stimulation effects that are not rapidly worsening can usually be discussed during office hours.
Contact the programming team rather than changing settings unless you have been specifically taught how to use your patient controller.
Every sign above is quoted from the sofidex article on Deep brain stimulation. If you are not sure, err upward — it is always reasonable to be checked.