Restless Legs Syndrome and Limb Movements in Sleep

What restless legs syndrome is

Restless legs syndrome (RLS), also called Willis-Ekbom disease, is a neurological condition that causes an irresistible urge to move the legs. It is a sleep disorder triggered by resting and trying to sleep, and also a movement condition, because people move their legs to find relief. [1] The NHS describes a strong need to move the legs, uncomfortable feelings such as tingling, throbbing or itching, and sometimes pain. Symptoms are usually worse at night and can affect sleep. [2]

Common features

• Sensations such as aching, throbbing, pulling, itching, crawling or creeping, usually in the legs and less often the arms. [1]
• Symptoms start or worsen when resting or sitting for long periods. [1]
• Relief with movement, though the feelings often return when movement stops. [1]
• Worse in the evening or night, with a distinct symptom-free period in the early morning. [1]
• Effects can include trouble falling or returning to sleep, daytime sleepiness, low mood, poor concentration and anxiety. [1]

Some other problems, such as leg cramps and peripheral neuropathy, cause similar symptoms. [2] Only a clinician can sort these apart.

Periodic limb movements in sleep

Most people with RLS also have periodic limb movement of sleep (PLMS), which causes involuntary leg or arm twitching or jerking during sleep, typically every 15 to 40 seconds. Most people with PLMS do not have RLS. [1] The National Institute on Aging describes periodic limb movement disorder as jerking and kicking of the legs every 20 to 40 seconds during sleep, with warm baths, exercise and relaxation among things that can help. [3]

Causes and associations

In most cases the cause is unknown. RLS often runs in families, and low levels of iron in the brain may be involved. [1] The NHS links it to iron and the brain chemical dopamine. [2] It can occur with:

• End-stage kidney disease and hemodialysis, nerve damage, sleep apnea and other sleep conditions. [1]
• Pregnancy, especially the last trimester; symptoms usually go away after delivery. [1]
• Alcohol, nicotine and caffeine use. [1]
• Certain medicines, including some anti-nausea drugs, antipsychotics, serotonin-raising antidepressants and some antihistamines. [1] Do not stop a prescribed medicine without talking to your prescriber. See Medicine interactions.

What helps

Established recommendation: address contributors first. The first step is to address anything that makes RLS worse, such as iron deficiency, diabetes, neuropathy or sleep apnea. [1] A blood test can check iron. [1] Low iron is covered in Anemia and iron deficiency. Do not start iron on your own without testing; ask a clinician.

Self-help the agencies list. Exercise during the day, regular sleep times, a warm bath or heat pads, walking, stretching or massaging the legs during symptoms, distraction, no caffeine after midday and no alcohol for 2 hours before bed. [2] NINDS also lists avoiding or reducing alcohol, nicotine and caffeine, moderate regular exercise and heating pads or ice packs. [1] See Sleep hygiene.

Medical treatment. Medicines include gabapentin enacarbil or pregabalin for moderate to severe RLS, iron supplements, and in severe cases other options. [1] Dopamine-raising medicines can help but long-term use may worsen symptoms. [1] The American Academy of Sleep Medicine now suggests against the standard use of dopamine agonists for RLS, because they may help in the short term but can cause symptoms to worsen over time. [4] A wearable device (TOMAC) has been approved by the FDA to reduce symptoms. [1]

Natural approaches

Magnesium: see Magnesium for sleep. A 2026 review of magnesium for sleep analyzed restless legs trials separately from its main sleep trials. [5] Proper evidence not found in the sources read to say whether magnesium helps RLS, and none on herbs or other supplements.

When to get help

See a GP if symptoms stop you sleeping, affect your mental health, or self-help has not helped. [2] Ask about sleep apnea if you snore or gasp (Sleep apnea). If symptoms worsen or do not improve, a specialist may be involved. [2]