His old knee injury began to flare up after the long hike
The conflict between the two countries threatened to flare up again
She's prone to flare ups of acne
The sudden argument caused their anger to flare up
My allergies always flare up in the spring
The restaurant's popularity seemed to flare up overnight
He needs to be careful not to flare up when criticized
The symptoms of the illness can flare up unexpectedly
The discussion about politics can sometimes flare up
The inflammation around the wound started to flare up
The old injury is starting to flare up again.
That sounds painful. Did you try resting it?
Yes, but the pain keeps coming back.
My allergies worsen every spring
Spring brings an increase in my allergy symptoms