Restless leg syndrome (RLS) causes an overwhelming urge to move your legs, usually because of uncomfortable sensations deep inside them. These feelings are worse at night and when you are sitting or lying still, and moving your legs brings temporary relief. The condition is also known as Willis-Ekbom disease, and it can make falling asleep or staying asleep very difficult.
What Are The Symptoms Of Restless Leg Syndrome?
The main symptom is a strong, nearly irresistible urge to move the legs. This urge is often, but not always, accompanied by unpleasant sensations. People describe these feelings in many ways, including creeping, crawling, pulling, throbbing, aching, or itching deep within the leg. The sensations are not on the skin’s surface; they feel like they are inside the leg.
Symptoms typically follow a distinct pattern. They begin or get worse during periods of rest or inactivity, such as sitting in a car, watching television, or lying in bed. The symptoms are most intense in the evening and at night. Movement provides relief, but the relief is usually temporary. As soon as you stop moving, the sensations often return.
What Do the Leg Sensations Actually Feel Like?
The sensations are difficult for many people to describe accurately. They are not painful in the traditional sense for most, but they are intensely uncomfortable and distressing. The feeling is often compared to a soda fizz inside the veins, or a deep tickle that cannot be scratched. Some people report a feeling like insects crawling just under the skin.
These sensations usually affect both legs, though they can be stronger in one leg than the other. In some cases, the arms or other body parts are involved, but this is less common and usually occurs in more severe cases. The intensity can vary from mildly irritating to completely disruptive.
How Do Symptoms Change Throughout the Day?
The circadian pattern is one of the most reliable features of RLS. Symptoms follow the body’s internal clock, not your level of fatigue. This means symptoms can be severe even if you are completely exhausted. They typically peak in the late evening and during the first half of the night.
For many people, symptoms are completely absent in the morning. The middle of the afternoon can bring a mild return of symptoms, especially during long periods of sitting. This daily rhythm is so consistent that doctors use it as one of the key diagnostic criteria for the condition.
What Is the Difference Between RLS and Leg Cramps?
Leg cramps and RLS are often confused, but they are very different conditions. A leg cramp is a sudden, sharp, intense pain caused by a muscle spasm. The muscle visibly tightens into a knot. The pain is immediate and severe, and it resolves when the muscle relaxes.
RLS does not involve muscle spasms or visible tightening. The discomfort is a sensation, not a cramp. Moving the legs relieves RLS symptoms, whereas stretching usually relieves a cramp. Cramps can happen at any time, while RLS symptoms follow the evening and nighttime pattern. These differences matter because the treatments for each condition are completely different.
When Do Symptoms Typically Start?
RLS can begin at any age, but there are two distinct patterns of onset. Early-onset RLS begins before age 45 and often runs in families. The symptoms may be mild at first and slowly worsen over many years. Some people with early-onset RLS have symptoms only occasionally for years before they become a regular problem.
Late-onset RLS begins after age 45 and tends to progress more quickly. This form is more often associated with other medical conditions, such as iron deficiency or kidney disease. If symptoms start suddenly and are severe, it is important to see a doctor, because a sudden onset can point to an underlying medical issue that needs evaluation.
How Do Doctors Diagnose RLS?
There is no blood test or scan that confirms RLS. Doctors diagnose it based on your description of symptoms. The diagnosis requires four essential features, according to international consensus criteria. The urge to move the legs must be present, symptoms must worsen with rest, movement must relieve them, and symptoms must be worse in the evening or at night.
Doctors will also ask about sleep problems, family history, and any medications you take. Some medications, including certain antidepressants and antihistamines, can trigger or worsen RLS symptoms. A physical exam is usually normal in people with RLS. The diagnosis is made from your history, not from a physical finding.
What Conditions Are Linked to RLS?
Iron deficiency is the most important medical condition associated with RLS. Low iron stores in the brain can cause or worsen symptoms even when blood iron levels appear normal. Doctors often check a blood test called ferritin, which measures stored iron. If ferritin levels are low, iron supplementation may improve symptoms.
Other conditions linked to RLS include kidney failure, diabetes, and peripheral neuropathy. Pregnancy is a common trigger, especially in the third trimester. Women are about twice as likely as men to have RLS. The condition is also more common in older adults, though it can affect people of any age.
How Do Symptoms Affect Sleep?
Sleep disruption is often the main reason people seek help. The urge to move makes it hard to fall asleep, and the symptoms can wake you up during the night. Many people find themselves pacing the floor in the middle of the night just to get relief. This leads to poor sleep quality and daytime fatigue.
The sleep loss from RLS can be significant. Some people get only a few hours of sleep per night for weeks or months at a time. This chronic sleep deprivation affects mood, concentration, and overall health. Treating the RLS symptoms usually improves sleep quality substantially.
How Are Symptoms Managed?
Treatment depends on severity and the underlying cause. If iron deficiency is present, correcting it is the first step. For mild symptoms, lifestyle changes may help. Regular moderate exercise, reducing caffeine and alcohol, and maintaining a consistent sleep schedule can reduce symptom frequency for some people.
For moderate to severe symptoms, medication may be necessary. Several classes of medications are used, including drugs that affect dopamine levels in the brain and medications that calm nerve signals. Some anti-seizure medications have been shown to reduce symptoms and improve sleep. These are prescription medications that require a doctor’s supervision because they have side effects and risks.
Frequently Asked Questions
Can restless leg syndrome go away on its own?
Mild cases can come and go, especially if triggered by temporary factors like pregnancy or a medication. Most people with chronic RLS need ongoing management because symptoms tend to persist or worsen over time.
Is restless leg syndrome a serious medical condition?
RLS is not life-threatening, but it can seriously affect sleep quality and daily functioning. The sleep loss associated with RLS can contribute to depression, anxiety, and reduced quality of life.
Does exercise help restless leg syndrome?
Moderate regular exercise can reduce symptom severity for some people, but intense exercise close to bedtime may make symptoms worse. The evidence for exercise as a treatment is modest, and it works best as part of a broader management plan.
Can children get restless leg syndrome?
Yes, children can have RLS, though it is less common than in adults. Children may describe the sensations differently and are often misdiagnosed with growing pains or attention problems.
