Titanium plate in skull. Is microcurrent facial safe?

I called my neurosurgeon who I haven’t needed to talk to in 10 years to ask this question. A nurse called back saying it was fine. I tried to make it very clear what my concerns were, asking the same question quite a few times, but she said it was fine. I’m still nervous though and wish I could’ve talked to my doctor but also don’t want to waste his time. I feel like I can’t call back either because I’m sure they’ll say we already answered this question. What do you think? Is it safe?