Quick Answer: Restless legs syndrome (RLS) is a strong urge to move your legs, usually with uncomfortable feelings that start or worsen at rest and are worse in the evening or at night. Moving brings relief. Low iron is a key cause to check. Since 2024, a major guideline recommends iron treatment first and advises against routine use of older dopamine drugs.
Not sure what is disturbing your nights? Try our sleep disorder probability calculator.
What Are The Symptoms Of Restless Legs Syndrome?
MedlinePlus describes RLS as a nervous system problem that causes an unstoppable urge to get up and pace or walk. You feel uncomfortable unless you move your legs, and moving stops the unpleasant feeling for a short time (MedlinePlus).
People describe the feelings in different ways. MedlinePlus lists creeping and crawling, bubbling, pulling or tugging, burning, aching or throbbing, itching or gnawing, and tingling or pins and needles. The NHS adds that some people also have symptoms in other parts of the body, such as the arms.
How Is Restless Legs Syndrome Diagnosed?
There is no single test. MedlinePlus says your provider takes a history and does an exam, and may order blood tests to look for iron deficiency anemia and other problems. Usually the diagnosis rests on your symptoms.
A medical review explains that the International Restless Legs Syndrome Study Group updated the criteria in 2014 to five features. They are an irresistible urge to move the legs, symptoms that begin or worsen at rest, relief from movement, symptoms that are worse in the evening or night, and symptoms that are not solely explained by another condition (diagnosis and treatment review).
What Else Can Feel Like Restless Legs?
Several things can look similar. The NHS names leg cramps and peripheral neuropathy. The review adds myalgia, venous stasis, leg swelling, arthritis, positional discomfort and habitual foot tapping. That fifth criterion exists so that these lookalikes are ruled out before RLS is diagnosed.
Unlike a cramp, RLS brings an urge to move that eases while you keep moving. If you are mostly bothered by sudden jerks as you fall asleep, read hypnic jerks instead.
How Common Is Restless Legs Syndrome?
Fairly common. The same review says women are more likely to be affected than men and that it becomes more common with age, with some studies estimating as high as 18 to 23 percent in older adults. It affects 1 to 4 percent of children and adolescents. Most people have mild to moderate symptoms, and only about 1 to 3 percent of people overall have severe and frequent ones.
| Group | Estimate |
|---|---|
| Children and adolescents | 1 to 4 percent |
| Severe and frequent symptoms | 1 to 3 percent of people overall |
| Some studies of older adults | Up to 18 to 23 percent |
These are ranges from different studies, so treat them as rough. MedlinePlus adds that RLS occurs most often in middle-aged and older adults.
What Happens To Your Sleep And Your Days?
MedlinePlus says the sensations are worse at night when you lie down, to the point that they may keep you awake. They can also start or worsen when you sit for long periods, which makes air or car travel, classes and meetings hard. Stress or emotional upset can make symptoms worse, and they may last an hour or longer.
Most people with RLS also have rhythmic leg movements during sleep, a condition called periodic limb movement disorder. Together, these make it hard to sleep. MedlinePlus says the lack of sleep can lead to daytime sleepiness, anxiety or depression, confusion and difficulty thinking clearly. RLS is not dangerous, but it can lower quality of life.
What Causes Restless Legs Syndrome?
No one knows exactly. MedlinePlus says it may be due to a problem with how brain cells use dopamine, a brain chemical that helps with muscle movement. The NHS says it is thought to be linked to iron and dopamine, and the review calls brain iron deficiency the prevailing theory for a key driver.
It is also more common in people with some conditions. MedlinePlus lists chronic kidney disease, diabetes, iron, magnesium or folic acid deficiency, anemia, Parkinson disease, peripheral neuropathy, pregnancy and multiple sclerosis. It also runs in families, especially when symptoms start young.
Can Medicines, Caffeine Or Alcohol Trigger It?
Yes. MedlinePlus says RLS may occur in people who use certain medicines, such as calcium channel blockers, lithium or neuroleptics, who are stopping sedatives, or who use caffeine, alcohol or nicotine. The AASM adds certain antidepressants and antihistamines to its list of factors to address first, along with untreated obstructive sleep apnea.
Never stop a medicine on your own. Ask your prescriber first.
Check your caffeine habits with the caffeine impact on sleep calculator.
For the alcohol side, read alcohol and sleep. MedlinePlus says caffeine, alcohol and tobacco may make symptoms worse, so cutting back is a low-risk first step.
Why Does Iron Matter?
Iron is the part of treatment that has changed most. The American Academy of Sleep Medicine (AASM) guideline raises the importance of checking iron in everyone with RLS and, depending on the results, recommends iron supplementation. For adults it gives a strong recommendation for intravenous ferric carboxymaltose and conditional recommendations for two other intravenous iron forms and for oral ferrous sulfate (AASM).
For children, ferrous sulfate is the only treatment it recommends, as a conditional recommendation. The review says ferritin and transferrin saturation should be checked at diagnosis and again if symptoms worsen. Do not start iron on your own, because only a blood test shows whether you need it.
Which Medicines Are Used, And What Is Augmentation?
The AASM guideline gives conditional recommendations against standard use of pramipexole and ropinirole, both of which had strong support in 2012 guidance. The reason is augmentation, the gradual worsening of RLS symptom intensity and duration that can follow long-term use of these dopamine-type drugs. The review puts the rate at about 8 percent per year for pramipexole.
In contrast, the guideline gives strong recommendations for gabapentin enacarbil, gabapentin and pregabalin, which are not linked to augmentation. It also gives conditional support to a wearable nerve-stimulation device used before bed and to low-dose opioids, which need careful oversight. Treatment is individual, so ask your doctor which option fits you and why.
What Can You Do At Home?
The NHS lists several steps that may reduce symptoms. Exercise during the day and keep the same bed and wake times. Try a warm bath or heat pads before bed. When symptoms hit, try walking, stretching or massaging your legs, or distract yourself with reading or a puzzle. MedlinePlus adds hot or cold packs, gentle stretches, yoga and meditation.
The NHS also advises:
- No caffeine after midday.
- No alcohol for at least 2 hours before bed.
- No big meal or strenuous exercise late at night.
- No smartphones or other devices right before bed.
- No naps during the day.
MedlinePlus also stresses getting enough sleep and keeping the bed and bedroom comfortable. Our sleep hygiene 101 guide covers the wider routine.
Does Restless Legs Syndrome Affect Pregnancy And Sleep?
It can. The AASM notes that RLS is common in pregnancy, and the NHS says pregnancy symptoms usually go away after giving birth. If you are pregnant, ask your clinician before taking any supplement or medicine. For comfort at night during pregnancy, see best sleep positions for pregnancy.
When To See A Doctor
Talk to a doctor if restless legs are stopping you from sleeping, affecting your mood, getting worse, or not improving with self-care. Mention loud snoring or gasping, because untreated sleep apnea can make RLS worse.
If low mood comes with thoughts of self-harm, call or text 988 in the US.
FAQs About Restless Legs Syndrome
What Is The Main Symptom Of Restless Legs Syndrome?
A strong urge to move the legs, often with uncomfortable feelings that begin at rest and ease with movement.
What Causes Restless Legs Syndrome?
The cause is not fully known. It is linked to dopamine and low brain iron, and to conditions such as kidney disease and pregnancy.
Is Restless Legs Syndrome Serious?
MedlinePlus says it is not dangerous, but it can make it hard to sleep and affect quality of life.
Can Low Iron Cause Restless Legs?
Low iron is a leading theory and a key thing to test. The AASM recommends checking iron in everyone with RLS.
What Is Augmentation?
It is the gradual worsening of RLS symptoms, linked to long-term use of dopamine medicines such as pramipexole.
What Helps Restless Legs At Night?
Walking, stretching, a warm bath, steady sleep times and less caffeine and alcohol may help, per the NHS and MedlinePlus.
Does Restless Legs Syndrome Go Away?
MedlinePlus says it cannot be cured, though treatment can relieve symptoms. Pregnancy-related RLS usually goes away after birth, per the NHS.
Your Next Step
Score how well you are sleeping and bring the result to your next appointment.