Definition
Restless leg syndrome is a sleep disorder
characterized by leg discomfort during sleep,
which is only relieved by frequent movements of
the legs.
Overview, Causes, &
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.
The disorder consists of sensations in the
lower legs that make the person uncomfortable
unless the legs are moved. The sensations
usually occur shortly after going to bed but may
also occur during the daytime.
The abnormal sensations occasionally occur in
the upper leg, the feet or the arms in addition
to the lower leg. There are often no obvious
vascular or neurologic abnormalities associated
with the disorder. Sometimes restless leg
syndrome can be associated with peripheral nerve
diseases, however.
There is an irresistible urge to walk or move
the legs to relieve the discomfort, resulting in
periodic episodes of leg movements during early
sleep stages. The symptoms may last for 1 hour
or longer.
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.
Symptoms &
Signs
- Sleeping difficulty
- Persistent leg movements during sleep
hours
- Irresistible urge to move the legs
- Abnormal sensation in the legs
(occasionally, feet, thighs, arms)
- Creeping sensations or discomfort
(not pain, not cramps) relieved by
movement of the legs
- May occur during the day
- Worse when lying down
Note: Symptoms may be worse during
stress or emotional upset
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