Trupedia condition guide
Restless Legs Syndrome
Clinical review required before publication. Last updated 1 August 2026.
Restless legs syndrome (RLS) causes a strong urge to move the legs, usually with uncomfortable sensations. Symptoms are characteristically worse during rest and in the evening or at night, and movement often gives temporary relief.
Common symptoms
People may describe tingling, throbbing, itching, pulling or pain in the legs. Sleep can be disrupted and some people also experience symptoms in their arms. Leg cramps and peripheral neuropathy can produce similar complaints, so the pattern and clinical history are important.
Causes and associations
There is often no single clear cause, and RLS can run in families. It is associated with iron status and dopamine pathways in the brain. It may also occur with pregnancy, iron deficiency anaemia, kidney disease or certain medicines.
How it is investigated
Assessment is primarily clinical. A clinician may review medicines and request blood tests when iron deficiency, anaemia, kidney disease or another contributor is possible. Ferritin can help assess iron stores, but results need clinical interpretation and thresholds used in RLS care may differ from a laboratory’s general reference interval.
Read the Trupedia guide to ferritin.
Managing symptoms
Regular daytime activity, consistent sleep times, a quiet sleep environment, stretching, massage and warmth may help. Reducing caffeine after midday and avoiding alcohol close to bedtime can also be useful. Treatment depends on severity and cause. Iron should only be taken when testing and clinical advice support it, because excess iron can be harmful.
When to seek medical advice
See a GP if symptoms regularly disrupt sleep, affect mental wellbeing or do not improve with self-care. Seek urgent medical help for sudden one-sided leg swelling, redness or severe pain, new weakness, loss of bladder or bowel control, chest pain or breathlessness, as these are not typical RLS symptoms.
Limitations
No single blood result diagnoses restless legs syndrome. Testing cannot exclude neurological, vascular or sleep disorders, and medicine changes should be made with the prescriber.
Sources
Explore available blood tests. Testing should complement an appropriate clinical assessment.