to become suddenly worse
My pain has flared up again.
Her symptoms flared up during the night.
Old disagreements flared up at the meeting.
This morning I was better but now my headache has flared up.
highlight
I need to flag up some issues.
She flagged up a mistake in the report.
Please flag up any concerns during the presentation.
consider
I have to weigh up the pros and cons of changing jobs.
You should weigh up your options before deciding.
Uninformed; not told what's going on.
They kept me completely in the dark about the decision.
A practice attempt before the real thing
Let's do a quick dry run so everything goes smoothly tomorrow.