Restless Leg Syndrome (RLS) and Periodic Limb Movement Disorder (PLMD) are believed to be related to some degree.  RLS affects at least 5% of the population, primarily adults.  The incidence of PLMD is probably 30% in individuals greater than 65 years of age, although the disorder can occur in infancy as well.

    RLS, which is primarily affects older individuals, may also be seen in patients under the age of thirty.  Many of those afflicted can have significant difficulty in falling asleep, due to uncontrollable sensations in their legs, usually causing them to move their legs continuously.  Thus the term "restless."  Often, victims will get out of bed and pace for hours.  Some individuals will march in place.  Other people may strike their legs to cause a discomfort that takes away from the usual disagreeable sensation in their legs, especially in the calves.  These disagreeable sensations are often described as creeping, crawling, tingling, slightly cramping, and "indescribable."  Unfortunately, the episodes may also occur during the day, and the excessive leg movements may actually convince the patient that he is actually nervous.

    Certain medical disorders associated with an increased incidence of both RLS and PLMD include iron-deficiency anemia, diabetes, alcoholism, and pregnancy.

    The diagnosis is primarily made from the patient's history.  Typically, these patients present with a complaint of insomnia associated with the need to move the legs incessantly while in bed.  The disagreeable sensation in the legs may also lead to a visit to the physician.  RLS is easily treatable with medication therapy, although the condition rarely resolves without treatment.  If you want further information, contact the RLS Foundation at:

RLS Foundation, Inc.

304 Glenwood Avenue

Raleigh, NC 27603-1455

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