What is Restless Legs Syndrome (RLS)?

Restless Legs Syndrome (RLS) is a condition characterized by difficult-to-describe sensations in the legs, feet, arms, and/or hands, particularly during periods of rest and in the evening or at night, along with an urge to move. People may describe these sensations as tingling, pulling, or feeling like they "cannot find a comfortable position." Walking for a short time, stretching, applying cold or warmth, or changing position often provides temporary relief. RLS can affect quality of life because it may lead to frequent sleep interruptions, daytime fatigue, and difficulty concentrating.

Symptoms

• A feeling of restlessness that increases while resting (sitting/lying down) or during travel
• Becoming more noticeable in the evening and at night
• Temporary relief with movement
• Difficulty falling asleep or frequent sleep interruptions

What Causes It?

RLS does not have a single cause; genetic predisposition, differences in the brain's regulation of a chemical called dopamine, and low iron stores (particularly low ferritin levels) are among the most prominent factors. Certain medications, pregnancy, chronic kidney disease, and conditions such as diabetes may also be associated with RLS. Even when iron levels appear to be within the normal range, symptoms may be more noticeable in people whose iron stores are low.

Who Is More Likely to Experience It?

• People with a family history of similar symptoms
• People with low iron stores (low ferritin/TSAT)
• People with magnesium deficiency
• People who are bedridden
• People who are pregnant
• People with chronic conditions (e.g., kidney disease)
• People with disrupted sleep schedules and sedentary lifestyles
• People experiencing high levels of stress

How Is RLS Diagnosed?

Diagnosis is primarily based on the medical history and symptom pattern. Symptoms that "increase during rest, improve with movement, and become more noticeable in the evening/night" are typical. If considered necessary, a doctor may use blood tests to evaluate parameters such as ferritin and transferrin saturation; other conditions that can cause similar symptoms, such as nighttime cramps or neuropathy, are also distinguished.

Treatment and Management

Treatment is individualized. The goal is to improve sleep and daytime functioning. In brief:

• Iron supplementation: If iron stores are low, a physician may plan oral iron treatment or, in appropriate patients, intravenous iron therapy.
• Lifestyle: Maintaining regular sleep times, limiting caffeine/nicotine/alcohol in the evening, taking short movement breaks during prolonged sitting, and incorporating light-to-moderate exercise throughout the day may be helpful.
• Medications: In some patients, medication may be considered if deemed necessary by a doctor; medical supervision is required.

What Can Be Done at Home?

• Try to sleep in a comfortable environment and go to bed and wake up at similar times,
• Avoid heavy, late meals in the evening,
• Spread movement throughout the day with gentle stretching and short walks,
• Take short movement breaks during long meetings or trips.
• Restio may also be used as a supportive option.

References

1. American Academy of Sleep Medicine (AASM). Restless Legs Syndrome (RLS) management – clinical guideline summaries.
2. Silber MH, et al. The Management of Restless Legs Syndrome: An Updated Algorithm. Mayo Clinic Proceedings, 2021.
3. Allen RP, et al. Evidence-based clinical practice guidelines for iron treatment of RLS/WED in adults. Sleep Medicine, 2018.
4. Cleveland Clinic. Restless Legs Syndrome (RLS): Causes, Symptoms & Management – patient information pages.