No one knows exactly what causes RLS. It may be due to a problem with the way brain cells use dopamine. Dopamine is a brain chemical that helps with muscle movement.
RLS may be linked to some other conditions. It may occur more often in people with:
- Chronic kidney disease
- Iron, magnesium, or folic acid deficiency
- Parkinson disease
- Peripheral neuropathy
- Multiple sclerosis
RLS may also occur in people who:
- Use certain medicines such as calcium channel blockers, lithium, or neuroleptics
- Are stopping sedative use
- Use caffeine
RLS occurs most often in middle-aged and older adults.
RLS is commonly passed down in families. This may be a factor when symptoms start at a younger age.
Restless legs syndrome (RLS) is a nervous system problem that causes you to feel an unstoppable urge to get up and pace or walk. You feel uncomfortable unless you move your legs. Moving stops the unpleasant feeling for a short time.
This disorder is also known as restless legs syndrome/Willis-Ekbom disease (RLS/WED).
Exams and Tests
There is no specific test for RLS. Your health care provider will take your medical history and do a physical exam. You may have blood tests and other exams to rule out conditions that can cause similar symptoms.
Usually, your provider will determine whether you have RLS based on your symptoms.
RLS is not dangerous. However, it can be uncomfortable, making it hard to sleep and affecting your quality of life.
You may not be able to sleep well (insomnia).
There is no way to prevent RLS.
RLS leads to unpleasant feelings in your lower legs. These feelings cause an unstoppable urge to move your legs. You may feel:
- Creeping and crawling
- Bubbling, pulling, or tugging
- Burning or searing
- Aching, throbbing, or pain
- Itching or gnawing
- Are worse at night when you lie down
- Sometimes occur during the day
- Start or get worse when you lie down or sit for long periods of time
- May last for 1 hour or longer
- Sometimes also occur in the upper legs, feet, or arms
- Are relieved when you move or stretch as long as you keep moving
Symptoms can make it difficult to sit during air or car travel, or through classes or meetings.
Stress or emotional upset can make symptoms worse.
Most people with RLS have rhythmic leg movements when they sleep. This condition is called periodic limb movement disorder.
All of these symptoms make it hard to sleep. Lack of sleep can lead to:
- Daytime sleepiness
- Anxiety or depression
- Difficulty thinking clearly
RLS can't be cured. However, treatment can help relieve symptoms.
Certain lifestyle changes may help you cope with the condition and ease symptoms.
- Get enough sleep. Go to bed and wake up at the same time every day. Make sure your bed and bedroom are comfortable.
- Try using hot or cold packs on your legs.
- Help your muscles relax with gentle stretches, massage, and warm baths.
- Take time out of your day to just relax. Try yoga, meditation, or other ways to ease tension.
- Avoid caffeine, alcohol, and tobacco. They may make symptoms worse.
Your provider may prescribe medicines to treat RLS.
Some medicines help control symptoms:
- Pramipexole (Mirapex)
- Ropinirole (Requip)
- Low doses of narcotics
Other medicines can help you sleep:
- Sinemet (combination carbidopa-levodopa), an anti-Parkinson medicine
- Gabapentin and pregabalin
- Clonazepam or other tranquilizers
Medicines to help you sleep may cause daytime sleepiness.
Treating conditions with similar symptoms such as peripheral neuropathy or iron deficiency can also help relieve symptoms.
When to Contact a Medical Professional
Call for an appointment with your provider if:
- You have symptoms of RLS
- Your sleep is disrupted
- Symptoms get worse
Allen RP, Montplaisir J, Walters WS, Ferini-Strambi L, Hogl B. Restless legs syndrome and periodic limb movements during sleep. In: Kryger M, Roth T, Dement WC, eds. Principles and Practice of Sleep Medicine. 6th ed. Philadelphia, PA: Elsevier; 2017:chap 95.
Chokroverty S, Avidan AY. Sleep and its disorders. In: Daroff RB, Jankovic J, Mazziotta JC, Pomeroy SL, eds. Bradley's Neurology in Clinical Practice. 7th ed. Philadelphia, PA: Elsevier; 2016:chap 102.
Garcia-Borreguero D, Kohnen R, Silber MH, et al. The long-term treatment of restless legs syndrome/Willis-Ekbom disease: Evidence-based guidelines and clinical consensus best practice guidance: A report from the International Restless Legs Syndrome Study Group. Sleep Med. 2013;14(7):675-684. PMID: 23859128.