This information is provided by the National Institutes of Health (NIH) Genetic and Rare Diseases Information Center (GARD).
Cramp-fasciculation syndrome (CFS) is a rare condition of the muscles characterized by persistent muscle cramping and twitching (fasciculations) in otherwise healthy individuals. This can lead to muscle discomfort, pain, or tiredness. Muscles in the leg are most commonly affected, although this condition may involve several parts of the body. Symptoms are thought to be due to over-activity of the associated nerves. In most cases, CFS occurs sporadically in people with no family history of the condition. There is limited information about the treatment of CFS, but certain medications have been reported as beneficial in individual cases.
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