Restless legs syndrome (RLS) is a neurological condition that creates an irresistible urge to move the legs. People often describe the accompanying sensations as crawling, tingling, pulling, itching, burning, or aching. Symptoms usually appear or become worse when sitting or lying down, particularly in the evening or at night. Walking, stretching, or moving the legs may provide temporary relief.
Because symptoms commonly interfere with falling asleep or staying asleep, RLS can lead to poor-quality sleep, daytime tiredness, and difficulty concentrating. It is considered both a movement disorder and a sleep-related condition.
Recognising the symptoms
RLS symptoms vary from occasional and mild to frequent and highly disruptive. Typical features include:
- A strong, difficult-to-control urge to move the legs
- Uncomfortable sensations deep inside the legs rather than only on the skin
- Symptoms that begin or worsen during rest or inactivity
- Temporary improvement with movement, stretching, or walking
- Symptoms that are more noticeable in the evening or at night
- Difficulty falling asleep, repeated waking, or daytime fatigue
RLS is different from ordinary muscle cramps, which usually cause a sudden, tight contraction. It can also resemble nerve-related tingling or other leg conditions, so persistent or disruptive symptoms deserve a medical assessment.
What may contribute to RLS?
The precise cause is not always clear. Brain pathways involved in movement, including those influenced by dopamine, may play a role, but RLS can arise for several different reasons. A family history increases the likelihood of developing it.
Other factors and conditions associated with RLS include:
- Low iron levels: Iron is involved in normal nervous-system function, and iron deficiency may contribute to symptoms.
- Pregnancy: RLS may appear or worsen during pregnancy, especially later in pregnancy, and often improves after delivery.
- Other health conditions: Kidney disease, diabetes, Parkinson’s disease, and some other chronic conditions may be associated with RLS.
- Medication effects: Some antihistamines, antidepressants, and antipsychotic medicines may trigger or aggravate symptoms in certain people.
RLS can also occur without an identifiable underlying condition. Do not stop a prescribed medicine on your own; ask a healthcare professional whether a medication could be contributing to the problem.
How RLS is diagnosed
There is no single test that confirms restless legs syndrome. Diagnosis is generally based on the pattern of symptoms, medical history, medication use, and a physical examination. A clinician may request blood tests, including tests related to iron levels, to look for treatable contributors.
A sleep study is not required for every person with RLS, but it may be considered when another sleep disorder is suspected or when the diagnosis is uncertain. Describing when symptoms occur, what they feel like, and what relieves them can help with assessment.
Practical ways to manage symptoms
Build supportive daily habits
- Keep a consistent sleep and wake schedule.
- Take regular, moderate exercise such as walking, but avoid strenuous activity close to bedtime if it makes symptoms worse.
- Reduce or avoid caffeine and alcohol, particularly later in the day, if they aggravate symptoms.
- Use gentle leg stretches, massage, or a warm bath before bed.
- Try relaxation methods such as slow breathing, meditation, or gentle yoga to reduce tension.
- During long periods of sitting, take brief movement breaks when possible.
A symptom diary can help identify triggers. Record sleep times, caffeine or alcohol intake, exercise, medicines, and when the sensations occur.
Medical treatment
If lifestyle measures are not enough, a healthcare professional can discuss treatment options based on symptom severity and the likely cause. If testing shows iron deficiency, iron treatment may be recommended and monitored by a clinician. Taking iron without medical guidance is not appropriate for everyone.
Other prescription treatments may be considered for persistent or moderate-to-severe symptoms. These can include certain medicines that affect dopamine pathways or medicines also used for nerve-related pain and seizures. Opioids are reserved for selected severe cases because of their risks and require careful supervision. Treatment should be individualised, since some medicines can lose effectiveness or worsen symptoms over time.
When to seek medical advice
Speak with a healthcare professional if leg discomfort repeatedly disrupts sleep, affects daytime functioning, begins during pregnancy, or develops after starting a new medicine. Seek help promptly if symptoms are sudden, one-sided, associated with swelling or weakness, or do not fit the usual pattern of RLS.
RLS can be frustrating, but identifying triggers, checking for contributing conditions, and choosing treatment with a clinician can make symptoms more manageable and support better sleep.
