It can be anything, not only flu. With any sort of infection or illness I normally expect my BG to be up by 1-2 mmol/l if I've "got something". Sometimes my BG is aware of it before I am, and I don't even have to be properly "sick". I think of it as my liver deciding I've got a problem and (helpfully) dumping some extra glucose.
I was more concerned because my Bg were dropping into the danger levels and I've never had numbers like that before. I forced myself to eat, which seemed to work, but it was something I'd never had before. Thank you all for responses.
I was more concerned because my Bg were dropping into the danger levels and I've never had numbers like that before. I forced myself to eat, which seemed to work, but it was something I'd never had before. Thank you all for responses.
The only thing that caused my BG to go down rather than up, which was virus related, was the covid jab and actual covid. (Not the latest kind, that made me go up too. The other ones since the first version of omicron, sent me down).