Dictionary

flare–up

noun \-ˌəp\

: a sudden occurrence of flame

: a sudden occurrence or expression of anger

: an occurrence in which something (such as violence or a disease) suddenly begins or becomes worse

Full Definition of FLARE-UP

1
:  a sudden outburst or intensification
2
:  a sudden bursting (as of a smoldering fire) into flame or light
3
:  a sudden outburst of or increase in the symptoms of a disease or condition

First Known Use of FLARE-UP

1839

flare–up

noun \-ˌəp\   (Medical Dictionary)

Medical Definition of FLARE–UP

:  a sudden appearance or worsening of the symptoms of a disease or condition <an asthmatic flare–up>

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