By Hannah Brooks · Updated August 24, 2026 · Fact-checked
You get into bed genuinely tired. Within ten minutes something starts up in your calves — not pain exactly, more a crawling, fizzing restlessness that builds until you have to move. You shift, you stretch, you get up and walk to the kitchen, and the sensation quiets down. Then you lie back down and it starts again.
If that is familiar, you are not imagining it and you are not merely fidgety. Restless legs syndrome is a recognised neurological condition, and it is more common than most people realise.
What restless legs syndrome is
Restless legs syndrome, sometimes called Willis-Ekbom disease, is defined by an urge to move the legs that is usually accompanied by uncomfortable sensations. People describe it as crawling, tugging, aching, or like carbonated water under the skin. Very few describe it as simple pain.
Clinicians look for a specific pattern rather than a lab test. Four features come up in every set of criteria: the urge to move worsens with rest, it eases at least temporarily with movement, it is worse in the evening or at night, and it is not fully explained by something else such as cramp or positional discomfort.
Estimates suggest it affects somewhere around five to ten percent of adults in Western populations, with a smaller share experiencing it often enough to disrupt sleep most nights. It is more common in women and becomes more common with age.
Why it happens
The mechanism is not fully mapped, but two threads dominate the research.
The first is dopamine signalling. Dopamine helps regulate movement, and its activity follows a daily rhythm that dips in the evening — which lines up neatly with why symptoms cluster at night. Medications that act on dopamine pathways often help, which supports the theory without proving it.
The second is iron in the brain. Even people whose blood iron looks normal can have low iron in specific brain regions, and iron is needed to make dopamine. This is why an iron panel is one of the first things a doctor will order, and why low ferritin is one of the few genuinely correctable causes.
Genetics play a part too — it often runs in families, and several risk variants have been identified.
Things that commonly make it worse
Some cases are primary, with no identifiable trigger. Many are aggravated by something specific, and that list is worth reading carefully because several items on it are within your control.
- Low iron stores, including from heavy periods, blood donation, or poor absorption
- Pregnancy, particularly the third trimester — symptoms usually settle after delivery
- Kidney disease, especially advanced kidney failure
- Certain medications, including some antihistamines, some antidepressants, and some anti-nausea drugs
- Alcohol, nicotine, and caffeine, particularly later in the day
- Sleep deprivation itself, which sets up a loop where symptoms cost you sleep and lost sleep worsens symptoms
That medication point matters. Never stop a prescription on your own, but if symptoms started shortly after a new drug, it is worth raising with whoever prescribed it.
How it wrecks your sleep
The obvious cost is the time spent getting to sleep. The less obvious one is what happens afterwards.
Most people with restless legs also have periodic limb movements during sleep — repetitive twitches or jerks, usually in the legs, that can occur every twenty to forty seconds for long stretches. They rarely wake you fully, but they fragment sleep architecture, which is why you can log eight hours and still feel like you were awake all night.
Over time that fragmentation shows up as daytime sleepiness, irritability, and trouble concentrating. Plenty of people arrive at a clinic complaining about fatigue and never mention their legs at all. If the pattern sounds close to your experience, our guide to what drives insomnia and what helps covers the sleep side in more depth.
What actually helps at home
These will not cure a moderate or severe case, but they are the first line for mild symptoms and they make treatment work better in everyone else.
- Move deliberately before bed. A short walk, calf stretches, or gentle lower-body movement in the evening helps many people. Intense exercise late at night tends to backfire.
- Try warmth or cool. A warm bath or a heat pack on the legs helps some people; others prefer cool. Both are worth testing.
- Massage the calves. Simple, free, and reported as helpful often enough to be worth trying.
- Cut evening alcohol and caffeine. Of all the self-help measures, this is the one people most often underestimate.
- Keep your sleep timing steady. Symptoms are worse when you are sleep-deprived, so a consistent schedule pays double. Our rundown of practical sleep hygiene habits is a good starting point.
- Distract during the evening. Occupying your attention — a task, a conversation, something with your hands — genuinely reduces how intrusive the sensation feels for many people.
When to see a doctor
Book an appointment if symptoms happen most nights, if they are costing you sleep, or if they have started interfering with your mood or concentration during the day.
Two things are worth asking for specifically. First, iron studies including ferritin — not just a standard haemoglobin check, because you can be low in stored iron with a normal blood count. Second, a review of your current medications to see whether anything you are taking is a known aggravator.
Treatment options exist and have improved. Iron supplementation under supervision helps when stores are low. Several prescription medications are used for moderate to severe cases, and the guidance on which to use first has shifted in recent years, partly because long-term use of some older options can eventually make symptoms worse. That is exactly why this belongs with a clinician rather than a supplement aisle.
Frequently asked questions
Is this the same thing as leg cramps?
No. A cramp is a sudden, painful, visible muscle contraction that you cannot move through. Restless legs is an urge to move accompanied by an uncomfortable sensation, and movement is what relieves it. The distinction usually makes it clear which one you are dealing with.
Will magnesium fix it?
Magnesium gets recommended constantly online, but the evidence for it in restless legs specifically is thin. It may help if you have a genuine deficiency or if cramping is part of your picture. Iron status has far better support and is the thing actually worth testing.
Can children get it?
Yes, though it is often missed. In children it is sometimes mistaken for growing pains or for hyperactivity, since a child who cannot sit still in the evening looks like a behaviour problem. Low iron is a common contributor in younger patients, so it is worth a proper assessment rather than assumptions.
The takeaway
Restless legs syndrome is a real neurological condition with a distinctive signature: an urge to move that builds with rest, eases with movement, and peaks at night. Cutting evening alcohol and caffeine, moving your legs before bed, and holding a steady sleep schedule are sensible first steps. But if it is costing you sleep most nights, ask for iron studies and a medication review — those two checks find a correctable cause more often than people expect.
This article is for general information only and is not medical advice. Speak with a qualified health professional about your own symptoms and treatment options.
