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Updated December 06, 2008

Definition: A flare-up is a time when symptoms are more intense. Many people with fibromyalgia and chronic fatigue syndrome experience periodic flare-ups separated by remissions, when symptoms recede.

With work, many people with fibromyalgia and chronic fatigue syndrome can identify what triggers or intensifies their flare-ups and can use that information to lessen their symptoms.

Sometimes, flare-ups are linked to a woman’s menstrual cycle, especially in fibromyalgia.

Also Known As: Flares
Alternate Spellings: Flare Up
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