What is restless leg syndrome?
Restless leg syndrome (RLS), also called Willis-Ekbom disease, is a common neurological condition that creates an almost irresistible urge to move your legs. It usually comes with uncomfortable sensations — a creeping, crawling, aching, pulling or tingling feeling deep in the legs. The urge shows up or gets worse when you're resting, tends to strike in the evening and at night, and eases when you get up and move.
That timing is exactly why RLS is so disruptive: it hits hardest right when you're trying to fall asleep. Many people spend years thinking it's "just nerves" or a habit. It isn't — it's a real, recognized condition, and for most people it responds well to treatment.
Common symptoms
Doctors look for four features that, together, point to RLS. The urge to move:
- 1 Comes with uncomfortable leg sensations
- 2 Starts or worsens during rest
- 3 Is relieved by moving or walking
- 4 Is worse in the evening and at night
- 5 Disrupts falling and staying asleep
- 6 Can involve the arms in some people
Many people with RLS also have periodic limb movements of sleep — brief, repeated leg jerks during the night — which a bed partner may notice more than the patient does.
Causes & common triggers
RLS often has no single cause, but several factors are strongly linked to it. Identifying them is a big part of getting relief, because some are very treatable.
Low iron
Low iron stores in the body — measured by a blood test called ferritin — are one of the most common and correctable contributors to RLS.
Genetics
RLS frequently runs in families, especially when symptoms begin earlier in life. A parent or sibling with the same complaint is a common clue.
Pregnancy
RLS can appear or worsen during pregnancy, particularly in the third trimester. It often eases on its own after delivery.
Medications & habits
Some antidepressants, antihistamines and anti-nausea drugs can trigger symptoms. Caffeine, nicotine and alcohol may make them worse.
RLS is also associated with certain chronic conditions, including kidney disease, iron-deficiency anemia and peripheral neuropathy. Part of our evaluation is sorting out what's driving your symptoms.
How we diagnose it
RLS is diagnosed mainly from your story, not a single test. A typical path with us looks like: