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Related to fibrositis: myositis
1. Inflammatory hyperplasia of white fibrous connective tissue.
[New Latin fibrōsus, fibrous (from Latin fibra, fiber) + -itis.]
(Pathology) inflammation of white fibrous tissue, esp that of muscle sheaths
fi•bro•si•tis(ˌfaɪ brəˈsaɪ tɪs)
a chronic disease syndrome marked by debilitating fatigue, widespread muscular pain, and tenderness at specific points on the body.
[1904; fibrose fibrous, to form fibrous tissue]
Pain in muscles around joints. When this occurs in the lower back it is sometimes called lumbago. The cause is not known, but tension and bad posture may be to blame.