Some sleep problems are about the mind racing. This one is about the legs: an irresistible urge to move them, arriving precisely when you lie down to rest. Restless legs syndrome (RLS) affects up to 1 in 10 people at some point, wrecks sleep thoroughly — and is one of the most treatable conditions on this site.
What RLS feels like
People reach for words like crawling, fizzing, tingling, itching inside the legs, or “like lemonade in my veins.” The defining features:
- An urge to move the legs, usually with the odd sensations;
- Worse at rest — sitting or lying down;
- Worse in the evening and night;
- Relieved by movement — walking, stretching — but only while moving.
Many people with RLS also have involuntary leg kicks during sleep (often reported by a partner), fragmenting the night further.
The iron connection — the most useful fact here
RLS is strongly linked to how the brain handles iron, and low iron stores (ferritin) are the most common treatable cause. Crucially, ferritin can be low enough to drive RLS while still sitting inside the “normal” lab range — specialists typically aim higher for RLS than the standard cut-off. If you have RLS symptoms, a ferritin blood test via your GP is the single highest-value step. RLS is also common in pregnancy (usually resolving after birth — see pregnancy and insomnia) and with kidney disease.
Triggers a pharmacist checks for
Several common medicines can trigger or worsen RLS: sedating antihistamines — including most over-the-counter sleep aids, an unfortunate irony (see OTC sleep aids explained) — some antidepressants, and some anti-sickness medicines. Caffeine, alcohol and nicotine all aggravate it too. Bring your full medicine list to us; spotting an RLS trigger takes a pharmacist about a minute.
What helps
- Fix the iron if ferritin is low — under GP guidance, not by self-dosing high-strength iron;
- Evening habits: moderate daytime exercise, leg stretches or massage, warm baths, and cutting evening caffeine and alcohol;
- Distraction that permits movement in the evening — many people manage symptoms better standing or pacing than fighting them on the sofa;
- Prescription options exist for persistent, severe RLS via your GP or a specialist. Note that standard sleeping tablets like zopiclone don’t treat RLS — they sedate you on top of it.
Frequently asked questions
How do I know it’s restless legs and not just fidgeting?
The pattern is diagnostic: an urge to move with odd sensations, worse at rest, worse in the evening, relieved only by movement. Fidgeting doesn’t wake you at 1am demanding you walk the hallway.
What blood test should I ask for with restless legs?
Ferritin (iron stores). Low ferritin is the most common treatable cause of RLS — and levels can be “normal” on standard ranges yet still too low for RLS, so mention the symptoms when requesting the test.
Can over-the-counter sleep aids make restless legs worse?
Yes — sedating antihistamines (the active ingredient in most OTC sleep aids) are a recognised RLS trigger. If your legs got worse after starting a night-time remedy, that’s likely why.
Does zopiclone help restless legs syndrome?
No — zopiclone sedates but doesn’t treat the underlying urge to move, and RLS has its own, different treatment pathway. See your GP for assessment, starting with a ferritin test.
Questions about your sleep or your medicines? Speak to one of our pharmacists — advice is free and confidential. If you already have a prescription, you can nominate our pharmacy to dispense and deliver it.
This article is general health information based on NHS and BNF guidance. It is not medical advice, and it is not an advertisement for any medicine. Always follow your prescriber’s instructions and read the patient information leaflet. If you need urgent help call NHS 111; in an emergency call 999. [Clinical review placeholder — reviewed by NAME, Superintendent Pharmacist, GPhC reg. NUMBER, on DATE.]