Restless legs syndrome explained: what it feels like, why it is often missed, and what helps

What restless legs syndrome feels like

Restless legs syndrome (RLS), also called Willis-Ekbom disease, is a neurological condition with one defining feature: an urge to move your legs that you cannot comfortably ignore. The urge usually comes with an unpleasant sensation deep in the legs. People describe it as crawling, creeping, pulling, throbbing, itching or aching, and many say it is hard to put into words.

Four things make the pattern recognisable:

• It starts or gets worse at rest. A film, a long drive or lying down in bed brings it on.
• It is worse in the evening and at night. Many people have a symptom-free window in the early morning.
• Movement relieves it. Walking, stretching or shaking the legs helps, but the feeling often returns as soon as you stop.
• It is an urge, not just a feeling. The need to move is the core of it.

Because it strikes exactly when you are trying to fall asleep, RLS often looks like insomnia from the outside. Nights get short, and the tiredness, low mood and poor concentration that follow are often what finally prompts people to ask for help. Many people with RLS also have periodic limb movements (twitching or jerking of the legs during sleep), although most people with those movements do not have RLS.

Why it is often missed

RLS is common, yet many people wait years before mentioning it, for a few reasons.

• The sensations are hard to describe, so people feel awkward raising them.
• Symptoms come and go, sometimes disappearing for weeks or months, especially early on.
• It gets filed under "trouble sleeping", so the conversation becomes about stress or insomnia instead of the legs.
• Nothing shows up on a scan or a routine exam, and there is no single test that confirms it.

RLS is a clinical diagnosis, made from the story you tell. A doctor listens for the four features above, asks about family history (RLS often runs in families), reviews your medicines, and looks for conditions that cause similar symptoms, such as leg cramps or nerve damage. Blood tests, particularly iron studies, are usually part of that assessment. A sleep study is not needed to make the diagnosis, although one may be suggested if another sleep disorder is suspected.

Iron, pregnancy and other triggers

In most people no single cause is found, and RLS is thought to involve how the brain handles iron and the chemical messenger dopamine. But several situations make it more likely or worse, and they change what a doctor can do.

Low iron and ferritin

Iron is the trigger most closely tied to RLS. The American Academy of Sleep Medicine (AASM) advises that everyone with significant RLS should have iron studies checked, including ferritin (a measure of stored iron) and transferrin saturation, and it notes that the iron levels used to guide treatment in RLS differ from those used for the general population. Iron stores that count as normal for most people can still be too low for someone with RLS, so a "normal" result from a routine check-up does not always settle the question. Do not start iron supplements on your own; the decision depends on your results.

Pregnancy

RLS is common in pregnancy, especially in the last trimester, and it usually settles within weeks of giving birth. Treatment choices in pregnancy need extra care, so raise the symptoms with your midwife or doctor rather than assuming nothing can be done; iron levels, in particular, can be checked.

Kidney disease and other conditions

RLS is common in people with kidney failure, including those on dialysis. It also appears alongside peripheral neuropathy (nerve damage, for example from diabetes) and untreated obstructive sleep apnea, and treating those conditions can ease the legs. If you snore loudly or gasp in your sleep, our guide to sleep apnea symptoms and treatments explains what to look for.

Medications that can make it worse

Several everyday medicines can start or worsen RLS: sedating antihistamines (including many over-the-counter sleep aids and allergy tablets), many antidepressants (particularly those that raise serotonin), and dopamine-blocking drugs used for nausea or as antipsychotics. Alcohol, caffeine and nicotine can aggravate it too. Never stop a prescribed medicine on your own, but do bring the full list to your appointment; a swap is sometimes the simplest fix.

What helps

Treatment depends on what is driving your symptoms and how severe they are. The realistic aim is fewer, milder evenings and better sleep rather than a cure.

Things you can try yourself

• Keep a regular sleep and wake time and protect the wind-down before bed. The basics in our sleep hygiene guide apply here.
• Exercise moderately and consistently during the day. Strenuous exercise late at night can backfire.
• Cut caffeine after midday, avoid alcohol in the hours before bed, and get support to stop smoking.
• When symptoms start, walk, stretch or massage the legs, try a warm bath or a heat pad, and distract yourself with a book or a puzzle.

Medical options

If self-care is not enough, medical options exist:

• Correcting iron with oral or intravenous iron when iron studies are low enough, guided by the results.
• Gabapentin, gabapentin enacarbil or pregabalin carry the AASM's strongest recommendations for adults with RLS.
• Dopamine agonists such as pramipexole and ropinirole were once the standard. They work in the short term, but long-term use can make symptoms worse over time (a problem called augmentation), so the AASM now suggests against their routine use. If you have taken one for years and your symptoms have crept earlier into the day, say so.
• Options for severe or resistant cases include a wearable leg-stimulation device and, under specialist supervision, opioids.

Talk with a doctor if the urge to move is stopping you from falling or staying asleep, affecting your mood or your daytime functioning, or has not improved with the self-help steps above, and raise it sooner if you are pregnant or have kidney disease. Nothing here can diagnose you: leg cramps, neuropathy, arthritis and poor circulation can all mimic RLS, and the treatments differ. Use this article to recognise the pattern and have a more useful conversation, not to replace one.

In summary

RLS is an urge to move the legs, with unpleasant sensations, that is worse at rest and in the evening and eased by movement. It is diagnosed from your story, not a scan. Low iron, pregnancy, kidney disease and some common medicines can cause or worsen it, and each can be addressed. Lifestyle steps help milder symptoms; for the rest, effective medicines exist, and the recommended first choices have changed.