1
: a sudden outburst or intensification
a flare-up of hostilities
2
: a sudden bursting (as of a smoldering fire) into flame or light
a danger of flare-ups
3
: a sudden appearance or worsening of the symptoms of a disease or condition
an asthmatic flare-up
Synonyms
Examples of flare-up in a Sentence
took medication to prevent a flare-up of her asthma
there's no need for an angry flare-up, as we'll take care of the problem immediately
Recent Examples on the Web
Limit triggers like harsh chemicals and drying ingredients. Reduce stress levels and get plenty of sleep, as stress can worsen dandruff symptoms or prompt flare-ups.
—
Cristina Mutchler, Verywell Health, 29 Oct. 2024
But why might seasonal changes trigger flare-ups in people with chronic illness?
—Alyssa Hui, Health, 28 Oct. 2024
But the often-not-so-secret CIA wars will continue just over the U.S.-Mexico border, with Joe juggling nation-saving combat and family flare-ups at home.
—Bryan Alexander, USA TODAY, 27 Oct. 2024
While studies show the 2% formulations are more effective at eliminating symptoms and preventing future flare-ups, this drugstore shampoo is a good option for those with more mild cases or those who don’t want to visit a dermatologist.
—Brigitt Earley, Glamour, 24 Oct. 2024
See all Example Sentences for flare-up 
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Cristina Mutchler, Verywell Health, 29 Oct. 2024
But why might seasonal changes trigger flare-ups in people with chronic illness?
—Alyssa Hui, Health, 28 Oct. 2024
But the often-not-so-secret CIA wars will continue just over the U.S.-Mexico border, with Joe juggling nation-saving combat and family flare-ups at home.
—Bryan Alexander, USA TODAY, 27 Oct. 2024
While studies show the 2% formulations are more effective at eliminating symptoms and preventing future flare-ups, this drugstore shampoo is a good option for those with more mild cases or those who don’t want to visit a dermatologist.
—Brigitt Earley, Glamour, 24 Oct. 2024
See all Example Sentences for flare-up
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Cite this Entry
“Flare-up.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/flare-up. Accessed 14 Nov. 2024.
Copy CitationMedical Definition
flare-up
noun
: a sudden appearance or worsening of the symptoms of a disease or condition
an asthmatic flare-up
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