Hi @Mandermartini. Sorry you're going through all this... again.
I, too, have been diagnosed with hyperostosis, on a bone scan that was otherwise normal. I will admit to having been concerned, like you. Over the couple of years since, I have come to the conclusion that it's something that is going to show up more as imaging methods improve, but that at this stage, noone really knows what the significance is.
I am a nurse, and it's still taken every bit of those couple of years for it to sit semi comfortably with me.
Thinking of you
Take care