Definition of Restless leg syndrome:

Restless leg syndrome is a sleep disorder characterized by leg discomfort during sleep, which is only relieved by frequent movements of the legs.

Causes, incidence, and risk factors:

Restless leg syndrome (RLS) occurs most often in middle-aged and older adults. It is worsened by stress. The cause is not known. RLS may occur more often in patients with peripheral neuropathy, chronic kidney disease, Parkinson's disease, pregnancy, iron deficiency, or the use of certain medications. A hereditary form also exists, and may be a factor when symptoms start at a younger age. The abnormal gene has yet to be identified.

Restless leg syndrome can result in a decreased quality of sleep (insomnia) with subsequent daytime sleepiness, anxiety or depression, and confusion or slowed thought processes from lack of sleep.