Why Do My Legs Feel Restless at Night?
Reviewed by our editorial team
Last updated: 2026-04-01
Quick Answer
Uncomfortable, crawling, or restless sensations in the legs at night — especially when resting and temporarily relieved by movement — are the defining symptoms of restless legs syndrome (RLS), a neurological condition affecting sleep.
Restless legs syndrome (RLS) — also known as Willis-Ekbom disease — is a neurological disorder characterized by an irresistible urge to move the legs, typically accompanied by uncomfortable or unpleasant sensations. These sensations are difficult to describe: people use terms like crawling, pulling, tingling, aching, or itching inside the legs. The defining feature is that the sensations worsen with rest and improve with movement.
RLS affects an estimated 5–10% of adults and is one of the most common causes of difficulty falling asleep and staying asleep. Despite its prevalence, it is frequently underdiagnosed — many people do not report it to their doctor because they assume it is normal, do not know it has a name, or are embarrassed to describe the symptoms.
Diagnostic Criteria for RLS
RLS is diagnosed clinically based on four key criteria: (1) an urge to move the legs, usually accompanied by uncomfortable sensations; (2) the urge and sensations begin or worsen with rest or inactivity; (3) the urge and sensations are partially or totally relieved by movement; and (4) the urge and sensations are worse in the evening or at night than during the day.
A fifth criterion helps distinguish true RLS from other conditions: symptoms are not better explained by another medical or behavioral condition. This helps distinguish RLS from leg cramps (which are painful muscular contractions without the urge to move), positional discomfort, or peripheral neuropathy.
Causes and Contributing Factors
The underlying cause of RLS involves dysregulation of the dopaminergic system in the brain. Iron deficiency is one of the most important modifiable risk factors: ferritin levels below 75 micrograms per liter are associated with RLS, and iron supplementation can significantly reduce or resolve symptoms in iron-deficient individuals. A blood test for ferritin is a standard part of RLS evaluation.
RLS has a strong genetic component — up to 60% of people with RLS have an affected first-degree relative. It is also associated with pregnancy (affecting up to 26% of pregnant women), chronic kidney disease, peripheral neuropathy, and certain medications including antidepressants, antipsychotics, and antihistamines that block dopamine receptors.
Treatment Options
Treatment depends on severity and underlying causes. For mild symptoms, non-pharmacological approaches are often tried first: regular aerobic exercise, leg massages, warm baths before bed, avoiding triggers (caffeine, alcohol, sleep deprivation), and iron supplementation if deficient.
For moderate to severe RLS, pharmacological treatment is typically needed. First-line medications include dopamine agonists (pramipexole and ropinirole) and the alpha-2-delta calcium channel ligands (gabapentin and pregabalin). Dopamine agonists carry a risk of augmentation — a paradoxical worsening of symptoms with long-term use — which is why treatment strategy should be carefully monitored by a physician.
When to Speak With a Doctor
If you regularly experience uncomfortable leg sensations that disrupt your ability to fall asleep, see your doctor. A simple blood test to check ferritin levels is a valuable starting point, and effective treatments are available for most people with RLS.
Frequently Asked Questions
References
- [1]American Academy of Sleep Medicine. Restless Legs Syndrome: Diagnosis and Management.
- [2]International RLS Study Group. Restless Legs Syndrome Diagnostic Criteria.
The information on this page is for educational purposes only and is not a substitute for professional medical advice. Always consult a qualified healthcare provider for diagnosis and treatment.