Go through these in order and stop at the first one that applies. If you are reading this for someone else, answer for them.
Get emergency help if swelling affects your breathing or swallowing, or if your tongue or throat swells rapidly.
These are not typical features of oral galvanism but can occur with a severe allergic reaction or spreading infection.
Make an appointment sooner if a filling or crown is loose, broken or painful when you bite.
Seek prompt dental or medical assessment for increasing pain, a mouth ulcer lasting more than two weeks, unexplained bleeding, a new lump, fever, pus or facial swelling.
These features may have another cause, such as infection, and should not be assumed to be oral galvanism.
Arrange a routine dental appointment if you have repeated metallic tastes, burning, tingling or electric sensations near dental work.
Every sign above is quoted from the sofidex article on Oral galvanism. If you are not sure, err upward — it is always reasonable to be checked.