Causes of Restless Legs Syndrome (RLS)

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The cause of RLS is not known.

RLS may be associated with nerve damage in the legs due to diabetes, kidney problems or alcoholism.

RLS can be a side effect of a pinched nerve root from arthritis in the lower back (sciatica).

RLS may be inherited.

Stress, diet or other environmental factors may play a role in RLS.

Pregnancy or hormonal changes may temporarily worsen RLS symptoms.

RLS can begin at any age. It becomes more severe in middle-to-old age.

Restless legs is a disorder that causes unpleasant sensations in the legs while lying down. These sensations, which are often described as a creeping or crawling sensation in the calves, typically occur at bedtime when the person is still awake, and can therefore make it difficult to fall asleep. Many people with Periodic limb movements also have restless legs syndrome, and almost all people with restless legs have Periodic limb movements.

Restless leg syndrome affects as much as 2-5 percent of the population.