Bigger Health Clue Hiding In Nighttime Restless Legs

Two people’s legs tangled under white sheets on a bed — Photo: fizkes / Shutterstock

That nightly urge to move your legs might be more than an annoying sleep thief. New research ties restless legs syndrome to a higher risk of dying early, especially from heart problems.

Quick Take

A meta-analysis of 13 studies found people with restless legs syndrome faced a 52% higher risk of death overall.
Separate studies on women and men both linked the condition to higher rates of cardiovascular death.
Doctors point to iron deficiency and kidney disease as possible drivers behind the pattern.
Not every study agrees, and the strength of the link changes depending on how researchers defined the condition.

What The Numbers Actually Show

Restless legs syndrome causes an uncomfortable urge to move your legs, usually worse at night. Doctors have long treated it as a sleep problem. But a pooled analysis of 13 cohort studies found something bigger. People with the condition had a 52% higher risk of dying from any cause compared to people without it.

The pattern shows up across different groups. A large study of women found those with restless legs syndrome had a 43% higher risk of dying from cardiovascular disease. A separate study of men found an even broader 39% jump in overall mortality risk after adjusting for age and other health factors. Researchers who ran the men’s study said the results held up even after accounting for known risk factors.

Why Legs Might Signal Trouble Elsewhere In The Body

Scientists think the connection may run through iron and blood flow. Low iron levels affect how the brain makes dopamine, a chemical tied to muscle control and movement. That same iron shortage shows up often in people with chronic kidney disease, a condition already linked to higher rates of heart trouble.

Sleep specialists now recommend checking iron levels in nearly everyone diagnosed with restless legs syndrome. Updated treatment guidelines call for iron testing as a standard step, with supplements recommended when levels run low. That shift suggests doctors see the leg symptoms as a possible clue pointing toward a deeper, treatable problem rather than a stand-alone nuisance.

Where The Evidence Still Splits

Not every study lines up the same way. Four separate cohort studies found no meaningful increase in all-cause mortality tied to restless legs syndrome. A broader review of prospective studies found the risk for stroke and death was significant before adjusting for other health factors, but weaker once researchers accounted for things like age, weight, and existing illness. Study design and how researchers diagnosed the condition both seem to matter a lot.

@Pyewacket49 Hi, Katie & Potato. I’ve been having a really bad time w/ my restless leg syndrome. I can’t stop my legs from moving. It’s horrible. Trivia night. I hope my legs don’t act up while I’m there. Have a good day. 🙂🙂🙂🐈‍⬛🥔🪶

— P. C. Kling (@boojune1954) September 10, 2026

For most people, restless legs syndrome remains a manageable, common condition rather than a death sentence. But the accumulating research gives patients and doctors a reason to look past the legs. A simple blood test for iron, a check on kidney function, or a closer look at heart health could matter more than another prescription for better sleep. That is a reasonable, low-cost step any doctor should be willing to take.