Restless Legs Syndrome

What is restless legs syndrome?

Restless legs syndrome, also called RLS or Willis-Ekbom disease, is a condition of the nervous system that creates a strong, often irresistible urge to move the legs. The urge is usually accompanied by uncomfortable sensations deep inside the legs, and it typically appears or worsens during rest — especially in the evening or at night. Moving the legs, stretching, or walking usually brings temporary relief, but the discomfort often returns as soon as the person sits or lies down again. In medical coding systems, restless legs syndrome is listed under ICD-10 code G25.81.

For many people asking what is restless legs syndrome, the simplest answer is this: it is a sensory and movement disorder that interferes with rest and sleep. Because symptoms peak in the evening and at night, RLS is classified as both a movement disorder and a sleep disorder. Poor sleep is often the reason people finally seek medical help, since night after night of disrupted rest can affect mood, concentration, and daytime energy.

Restless legs syndrome can affect people of any age, including children, although it becomes more common with increasing age. It occurs in both men and women, but women are affected somewhat more often, and symptoms frequently appear or worsen during pregnancy. The condition can run in families, particularly when it begins earlier in life. Severity varies widely: some people have mild, occasional symptoms, while others experience distressing sensations almost every night. Restless legs syndrome is generally managed by neurologists and sleep medicine specialists; within Acibadem, the neurology department is the specialty unit that evaluates and treats this condition.

Symptoms of restless legs syndrome

Restless legs syndrome symptoms center on an urge to move that is difficult to resist. People describe the sensations in many different ways, and some find them hard to put into words at all. Common descriptions include:

• Crawling or creeping feelings deep inside the legs, often between the knee and ankle
• Tingling, pulling, or throbbing sensations that are uncomfortable rather than sharply painful
• Itching or aching that cannot be relieved by scratching or rubbing alone
• An urge to move that builds during stillness and eases, at least temporarily, with movement
• Worsening in the evening and at night, with symptoms often mildest in the morning
• Difficulty falling asleep or staying asleep because of the discomfort

Four features define the condition: an urge to move the legs, usually with unpleasant sensations; symptoms that begin or worsen during rest or inactivity; relief with movement for as long as the movement continues; and a clear worsening in the evening or at night. In some people the arms are also affected, though this is less common than leg involvement.

Many people with restless legs syndrome also have periodic limb movements of sleep — repetitive jerking or twitching of the legs that occurs during sleep, often without the person being aware of it. A bed partner may be the first to notice these movements. Periodic limb movements can further fragment sleep and contribute to daytime tiredness.

Doctors often distinguish between two broad patterns. In early-onset (primary) RLS, symptoms typically begin before roughly age 45, progress slowly over many years, and often occur in families. In late-onset (secondary) RLS, symptoms begin later in life, may progress more quickly, and are more likely to be linked to another condition, such as iron deficiency or kidney disease. Symptom severity can also fluctuate: many people experience periods when symptoms fade, followed by periods when they return or intensify. Stress, fatigue, long periods of sitting (such as long flights or car trips), and certain medications can make symptoms more noticeable.

Causes and risk factors

Restless legs syndrome causes are not fully understood, but research points to problems in how the brain handles dopamine — a chemical messenger that helps control movement — and how the body stores and uses iron, which the brain needs to make dopamine properly. In many cases, iron levels in the brain appear to be low even when blood tests show normal or borderline iron levels in the rest of the body.

Doctors generally group the condition into two categories:

• Primary (idiopathic) restless legs syndrome: no other cause is found. This form often runs in families and tends to start earlier in life, suggesting a genetic contribution. Several gene variants have been associated with a higher risk.
• Secondary restless legs syndrome: symptoms are linked to another condition or circumstance. When the underlying issue is treated or resolves, symptoms often improve.

Conditions and factors that are commonly associated with restless legs syndrome include:

• Iron deficiency, with or without anemia (low red blood cell counts)
• Chronic kidney disease, especially in people receiving dialysis
• Pregnancy, particularly in the third trimester; symptoms often ease after delivery
• Peripheral neuropathy — damage to the nerves in the legs and feet, sometimes caused by diabetes
• Certain medications, including some antidepressants, antihistamines (allergy medicines), and anti-nausea drugs, which can trigger or worsen symptoms in some people
• Family history of restless legs syndrome
• Lifestyle factors such as caffeine, alcohol, nicotine, and sleep deprivation, which can aggravate symptoms in many people

It is important to understand that restless legs syndrome is a real neurological condition, not simply nervousness or a habit. It is also different from ordinary leg cramps, which involve a sudden, painful muscle contraction, and from positional discomfort that resolves as soon as you change position.

Diagnosis

There is no single blood test or scan that proves someone has restless legs syndrome. Instead, restless legs syndrome diagnosis is clinical, meaning it is based on a careful conversation about symptoms and a physical examination. Doctors use internationally accepted criteria, which require all of the following:

• An urge to move the legs, usually accompanied by uncomfortable sensations
• Symptoms that begin or worsen during rest or inactivity
• Symptoms that are partly or completely relieved by movement, at least while the movement continues
• Symptoms that are worse in the evening or at night than during the day
• Symptoms that are not better explained by another condition, such as leg cramps, arthritis, positional discomfort, or habitual foot tapping

Your doctor will typically ask when symptoms started, how often they occur, what makes them better or worse, how they affect your sleep, and whether relatives have similar complaints. A review of your medications is important, because some drugs can trigger or worsen symptoms. A physical and neurological examination helps rule out other explanations, such as nerve damage or circulation problems in the legs.

Although no test confirms restless legs syndrome directly, certain tests help identify contributing conditions:

• Blood tests, particularly ferritin (a measure of the body’s iron stores), and often kidney function, blood sugar, and vitamin levels. Low or borderline ferritin is a common and treatable contributor.
• Sleep studies (polysomnography) are not required to diagnose restless legs syndrome, but a doctor may recommend one if the diagnosis is unclear, if another sleep disorder such as sleep apnea is suspected, or to document periodic limb movements of sleep.
• Nerve studies may be considered if peripheral neuropathy is suspected as a cause of the leg sensations.

Imaging tests such as MRI or CT scans are not used to diagnose restless legs syndrome itself, though they may occasionally be ordered to exclude other conditions. In children, diagnosis can be more challenging because young patients may describe the sensations as “growing pains” or have trouble explaining what they feel, so doctors take extra care to gather details from both the child and the parents.

Treatment options

Restless legs syndrome treatment depends on how severe and how frequent the symptoms are, and on whether an underlying cause can be found. There is no cure that works for everyone, but in many cases symptoms can be reduced to a manageable level. Treatment plans are usually developed by a neurologist or sleep specialist; the neurology department at Acibadem is among the units that manage this condition.

Treating underlying causes

When restless legs syndrome is linked to another condition, addressing that condition often comes first. If iron stores are low, your doctor may recommend iron supplements, taken under medical supervision because too much iron can be harmful. If a medication appears to be triggering symptoms, your doctor may adjust the dose or suggest an alternative — do not stop prescribed medicines on your own. Symptoms related to pregnancy frequently improve after delivery, and symptoms related to kidney disease are managed as part of overall kidney care.

Lifestyle measures and watchful waiting

For mild or occasional symptoms, doctors often begin with non-drug approaches and simple observation. Helpful measures may include:

• Keeping a regular sleep schedule and practicing good sleep habits
• Moderate, regular exercise — very intense exercise late in the day can worsen symptoms in some people
• Reducing or avoiding caffeine, alcohol, and nicotine, especially in the evening
• Leg massage, stretching, warm baths, or alternating warm and cool packs on the legs
• Mental engagement during periods of enforced sitting, such as puzzles or conversation, which some people find distracting from the sensations
• Planning long trips so you can take breaks to walk and stretch

Some people benefit from medical devices, such as compression or vibration devices designed for restless legs syndrome; your doctor can advise whether these are appropriate for you.

Medications

When symptoms are frequent and disrupt sleep or daily life, medication may be considered. Several drug classes are used, and the choice depends on your overall health, other medications, and symptom pattern:

• Alpha-2-delta calcium channel ligands (a group of nerve-calming medicines originally developed for seizures and nerve pain) are often preferred as first-line drug treatment in current practice.
• Dopamine agonists — medicines that mimic dopamine in the brain — can be effective, but long-term use carries a risk of augmentation, a phenomenon in which symptoms gradually start earlier in the day, become more intense, or spread to other body parts. Because of this, doctors monitor these medicines carefully and may limit their use.
• Iron therapy, oral or in some cases intravenous, when iron stores are low.
• Other medications, including certain opioid medicines at low doses or specific sleep-supporting drugs, may be considered in selected, more resistant cases, always weighing benefits against risks and side effects.

All of these medicines require a prescription and ongoing follow-up. Doses often need adjustment over time, and what works well for one person may not suit another.

Procedures and surgery

There is no standard surgical operation for restless legs syndrome itself. Surgery or procedures are relevant only when a separate, treatable condition is contributing to leg symptoms — for example, if a distinct nerve or vein problem is identified during evaluation. If your symptoms turn out to be caused by something other than restless legs syndrome, your care team will discuss the appropriate treatment for that condition.

Living with restless legs syndrome and outlook

Restless legs syndrome is usually a long-term (chronic) condition, but its course is not the same for everyone. In many people, symptoms fluctuate — easing for weeks or months and then returning — and primary restless legs syndrome tends to progress slowly, if at all. Secondary forms often improve substantially when the underlying cause, such as iron deficiency, is corrected. The condition is not known to be life-threatening and does not damage the legs, but untreated symptoms can significantly affect sleep, mood, concentration, and quality of life.

Practical steps that many people find helpful include keeping a symptom diary to identify personal triggers, protecting a consistent bedtime routine, staying physically active at a moderate level, and telling doctors about the condition before starting any new medication, since some common drugs can worsen symptoms. If you take medication for restless legs syndrome, regular follow-up matters: it allows your doctor to check for side effects, adjust doses, and watch for augmentation with dopamine-based drugs.

It is honest to say that treatment usually aims at control rather than cure. Many people achieve meaningful relief and sleep much better with the right combination of lifestyle measures and, when needed, medication — but responses vary, and it can take time and some trial and adjustment to find what works for you.

Frequently asked questions

What is restless legs syndrome in simple terms?

Restless legs syndrome is a nervous system condition that causes an uncomfortable urge to move the legs, mainly during rest in the evening or at night. The sensations — often described as crawling, tingling, or pulling — ease with movement but return with stillness, which is why the condition so often disturbs sleep. It is a recognized medical disorder, not a habit or a sign of anxiety alone.

Can restless legs syndrome go away on its own?

Sometimes. Symptoms linked to a temporary cause, such as pregnancy or iron deficiency, often improve or resolve when that cause is addressed or passes. Primary restless legs syndrome, however, is usually a long-term condition with periods of improvement and worsening rather than a permanent cure. Because the course varies from person to person, a doctor is best placed to advise on your individual situation.

How serious is restless legs syndrome?

Restless legs syndrome is not considered life-threatening and does not harm the legs themselves. Its main impact comes from disrupted sleep, which over time can affect mood, memory, concentration, and daytime functioning. For some people symptoms are mild and occasional; for others they are severe and nightly. If symptoms interfere with your sleep or daily life, evaluation and treatment are worthwhile.

What triggers restless legs syndrome symptoms at night?

Symptoms follow the body’s internal clock and naturally intensify in the evening and at night, especially during prolonged stillness. Common aggravating factors include caffeine, alcohol, nicotine, sleep deprivation, stress, long periods of sitting, and certain medications such as some antidepressants and antihistamines. Identifying and reducing your personal triggers is often one of the first steps in managing the condition.

How do doctors confirm a restless legs syndrome diagnosis?

Diagnosis is based on your description of symptoms matched against established clinical criteria, together with a physical and neurological examination. Blood tests, particularly ferritin to measure iron stores, are commonly ordered to look for treatable contributors, and a sleep study may be recommended if another sleep disorder is suspected. There is no single scan or test that proves the condition on its own.

Is there a permanent cure for restless legs syndrome?

There is currently no treatment that permanently cures restless legs syndrome for everyone. That said, many people achieve good, lasting control of their symptoms through a combination of lifestyle changes, correction of iron deficiency when present, and, if needed, prescription medication. Treatment plans are individualized and may need adjustment over time, so ongoing follow-up with your doctor is important.

Does restless legs syndrome get worse with age?

In many cases, particularly the early-onset primary form, symptoms progress slowly over years, and some people notice more frequent or intense symptoms as they get older. Others remain stable for long periods or experience remissions. Worsening symptoms are not inevitable, and if your symptoms change noticeably, it is worth discussing this with your doctor, since medication effects, iron levels, or other health changes may be involved.

When to see a doctor

Consider making an appointment if leg discomfort and an urge to move regularly disturb your sleep, if symptoms are affecting your mood or daytime functioning, or if self-care measures have not helped. Also seek advice if symptoms began or worsened after starting a new medication, or during pregnancy.

Seek medical attention promptly if you notice any of the following warning signs, which may point to a different or more urgent problem rather than typical restless legs syndrome:

• Sudden weakness, numbness, or loss of movement in a leg or on one side of the body
• Severe leg pain with swelling, redness, or warmth in one leg, which can suggest a blood clot
• A cold, pale, or discolored leg or foot, which may indicate a circulation problem
• Leg symptoms accompanied by chest pain or shortness of breath
• Loss of bladder or bowel control together with leg symptoms or back pain
• Rapidly worsening symptoms or symptoms that spread to other parts of the body despite treatment, which should be reviewed by your doctor, particularly if you take dopamine-based medication

If you already have a diagnosis of restless legs syndrome, tell your doctor if your medication seems to be losing effect, if symptoms start earlier in the day than before, or if you develop new side effects. Regular follow-up helps keep treatment safe and effective over the long term.