Restless legs syndrome (RLS) causes an uncomfortable, hard-to-describe urge to move your legs, usually with a crawling, tingling, or aching sensation underneath the skin. It gets worse when you’re still, especially in the evening and at night, and briefly eases when you move, which is exactly what makes it so disruptive to falling asleep.
Who This Is For
This is for you if lying still in bed triggers an urge to move your legs that you can’t ignore, especially if it’s worse in the evening and temporarily relieved by walking, stretching, or shaking your legs out.
Quick Fix / Summary
- RLS is a specific neurological condition, not just general restlessness or anxiety
- The key sign is an urge to move that’s worse at rest and eases with movement
- Low iron is a commonly linked, and often treatable, contributing factor
- Caffeine, alcohol, and certain medications can make it worse
- Moderate exercise, leg stretches, and consistent sleep timing may help some people
- See a doctor if it’s frequent, since an iron check and, in some cases, medication may help
Why This Happens
Researchers don’t know the exact cause of RLS, but it’s closely linked to how your brain uses dopamine and iron. Iron is needed to produce dopamine, and the NINDS says low iron levels in the brain may be responsible. Genetics also plays a role, particularly when symptoms begin before age 40.
This is different from the general restlessness we cover in why you feel restless when trying to sleep. That article covers a keyed-up nervous system, racing thoughts, stress, overstimulation. RLS is a distinct, physical urge specifically in the legs, driven by a different mechanism entirely, and relaxation techniques that help general restlessness may not be enough on their own.
RLS is also often confused with periodic limb movement disorder (PLMD), a related but separate condition involving repetitive jerking or twitching movements of the legs during sleep, which the person is usually unaware of unless a bed partner points it out. RLS is the waking urge to move; PLMD is the involuntary movement itself, and it typically shows up once you’re already asleep. The two often occur together (the NIH reports that more than 80 percent of people with RLS also have periodic limb movements of sleep), but they’re diagnosed and treated somewhat differently, and a sleep study is the most reliable way to confirm PLMD specifically.
Common Contributing Factors
- Iron deficiency (even mild, subclinical cases)
- Pregnancy, especially in the third trimester
- Family history of RLS
- Kidney disease and certain other chronic conditions
- Certain medications, including some antihistamines and antidepressants
- Caffeine and alcohol, which can worsen symptoms
How to Fix It
1. Rule Out Low Iron
A simple blood test (ferritin level) can identify whether iron deficiency is contributing. If it is, addressing it, through diet or supplementation under a doctor’s guidance, may help (the NINDS lists iron supplements as the recommended first treatment for people with low ferritin), and the American Academy of Sleep Medicine’s 2024 guideline includes a good practice statement that iron studies should be performed regularly in people with RLS. In some cases doctors use intravenous iron (the guideline strongly recommends IV ferric carboxymaltose for some patients).
2. Cut Back on Caffeine and Alcohol
The National Institute of Neurological Disorders and Stroke lists alcohol, nicotine, and caffeine among the things that can aggravate RLS. Reducing intake, especially in the afternoon and evening, is a low-cost step some people try for a couple of weeks to see whether it helps.
3. Build in Moderate Daily Exercise
Moderate exercise may help. The National Institute of Neurological Disorders and Stroke notes that aerobic and leg-stretching exercise of moderate intensity may provide relief, and in a small randomized controlled trial (28 people completed it), a 12-week program of aerobic and lower-body resistance training three days a week lowered RLS symptom scores compared with no exercise.
4. Stretch or Massage Before Bed
Leg stretches, a warm bath, or massaging your calves and lower legs before bed may ease the urge to move for some people, though evidence for these is limited.
5. Review Medications With Your Doctor
If symptoms started after beginning a new medication, mention it to your doctor, some antihistamines and antidepressants are known to worsen RLS, and alternatives may be available.
6. Medication for More Severe Cases
When lifestyle changes aren’t enough, doctors can prescribe medication. The American Academy of Sleep Medicine’s 2024 guideline conditionally recommends against the standard use of dopamine agonists such as pramipexole and ropinirole because of the high long-term rate of augmentation (described below), and strongly recommends the gabapentinoid medications gabapentin, gabapentin enacarbil, and pregabalin, alongside treating iron deficiency. This is a conversation for a doctor, not a self-directed step, the right medication depends on severity and other health factors. One thing worth raising with your doctor specifically: dopamine-agonist medications can cause a phenomenon called augmentation, where symptoms gradually get worse, start earlier in the day, or spread to other body parts the longer the medication is used. It’s a known risk with long-term use, not a sign the medication is failing outright, and it’s managed by adjusting the treatment approach, so it’s worth periodically checking in with your doctor rather than assuming a worsening pattern is just the condition progressing on its own.
Practical Tips That Actually Help
- If it flares up at bedtime → get up and walk for a few minutes rather than lying still fighting it
- If you drink coffee → try shifting your last cup earlier in the day for two weeks and compare
- If you’re often tired despite enough time in bed → ask your doctor for a ferritin (iron) test
- If it started after a new medication → flag it to whoever prescribed it
- Keep a simple log of when it’s worse, timing, caffeine, activity level, to spot your own patterns
Common Mistakes to Avoid
- Assuming it’s just restlessness or anxiety, RLS is a distinct condition and may not respond to relaxation techniques the way general restlessness does
- Ignoring it as “normal”, frequent RLS can often be managed, so it is worth raising with a doctor
- Starting iron supplements without testing first, too much iron carries its own risks; get tested before supplementing
- Only trying to power through it, movement genuinely relieves symptoms; fighting the urge to stay still usually backfires
RLS is a movement disorder, not a general sense of unease, but the two get confused often, if what you feel is more like a full-body inability to settle rather than a specific urge to move your legs, general nighttime restlessness may be a better fit than RLS. If what you feel is a sudden, painful tightening in the calf rather than an urge to move, see why you get leg cramps at night.
RLS is also frequently confused with other nighttime movement issues, if the movement happens while you are fully asleep and unaware rather than while trying to fall asleep, that points toward sleepwalking instead.
Related Reading
When to See a Doctor
See a doctor if the urge to move your legs happens often, keeps you from falling asleep, or leaves you tired during the day. RLS is diagnosed from your symptoms and history, and a doctor can check iron levels (ferritin), review medications that may be contributing, and discuss treatment options if you need them.
Don’t start iron supplements or stop a prescribed medication on your own. If you are already taking a dopamine-agonist medication and your symptoms are starting earlier in the day, spreading, or getting worse, tell your prescriber, since these can be signs of augmentation.
FAQ
Is restless legs syndrome the same as periodic limb movement disorder?
No. RLS is the waking urge to move your legs before or while falling asleep. PLMD is involuntary jerking or twitching that happens after you’re already asleep. Many people with RLS also have PLMD, but they’re assessed separately, usually with a sleep study.
Can restless legs syndrome go away on its own?
Sometimes, especially when it’s linked to a temporary cause like pregnancy or a specific medication, it may improve once that trigger resolves or changes (the NINDS says pregnancy-related symptoms usually disappear within 4 weeks after delivery). When it’s linked to iron levels or genetics, it may be more persistent, though treatment options exist.
What is augmentation, and should I be worried about it?
Augmentation is a known effect of some long-term RLS medications where symptoms gradually worsen or start earlier in the day. It’s manageable by adjusting treatment, so it’s not a reason to avoid medication altogether, just something to mention to your doctor if symptoms seem to be creeping earlier or spreading over time.
Does low iron always mean I have restless legs syndrome?
No. Low iron is a commonly linked contributing factor, but RLS is diagnosed by symptoms, the urge to move that’s worse at rest and relieved by movement, not by an iron test alone. A ferritin test simply helps identify a fixable cause once RLS is suspected.
Key Takeaways
- RLS is a distinct neurological condition, an urge to move the legs that’s worse at rest and relieved by movement
- Low iron is a commonly linked contributing factor worth checking with a blood test
- Cutting caffeine/alcohol, regular moderate exercise, and evening stretching may help some people
- See a doctor if it’s frequent, iron correction and medication may help, and long-term medication use is worth periodically reviewing for augmentation
If you or a partner have also noticed episodes of sleepwalking, it is worth mentioning to a doctor, since disrupted sleep from any cause may play a part.
Restless legs symptoms that appear alongside fatigue, weight changes, or feeling unusually cold are also worth discussing with a doctor in the context of thyroid problems and sleep, since thyroid problems may be linked to restless legs symptoms in some people.
About This Article
This article is part of Sleep Fixes, a site focused on practical, easy-to-follow solutions for common sleep problems like night waking, dry mouth, overheating, and disrupted sleep.
The content is based on widely accepted sleep principles and common real-world patterns, with a focus on simple changes that may improve sleep quality.
It is not medical advice. If your symptoms are severe, persistent, or worsening, consider consulting a qualified healthcare professional.