Definition:
Chronic, in terms of illness, means lasting for a long time or constantly recurring. Both fibromyalgia and chronic fatigue syndrome are chronic conditions.
By Adrienne Dellwo, About.com Guide
Updated December 26, 2012
About.com Health's Disease and Condition content is reviewed by the Medical Review Board
Chronic, in terms of illness, means lasting for a long time or constantly recurring. Both fibromyalgia and chronic fatigue syndrome are chronic conditions.
©2013 About.com. All rights reserved.