Core Symptoms
- Uncomfortable sensations in the legs (creeping, crawling, tingling, aching)
- Irresistible urge to move the legs
- Worse during rest or inactivity, especially in the evening/night
- Temporary relief with movement (walking, stretching)
- Can significantly disrupt sleep
The Iron Connection — Essential First Test
Iron is a cofactor for dopamine production in the brain, and low brain iron (even with normal blood haemoglobin) is strongly linked to RLS. Ferritin should be checked in everyone with RLS — a target ferritin above 75 ng/mL (higher than the standard 'normal' range) is often recommended for RLS symptom control.Other Associations and Triggers
| Factor | Link to RLS |
|---|---|
| Pregnancy | RLS is common, especially in the third trimester, and usually resolves after birth |
| Chronic kidney disease/dialysis | Strong association |
| Certain medications | Antihistamines, antidepressants (SSRIs), antipsychotics can worsen RLS |
| Caffeine, alcohol, nicotine | Can trigger or worsen symptoms |
| Family history | Strong genetic component in many cases |
Treatment Options
| Treatment | Notes |
|---|---|
| Iron supplementation | First-line if ferritin <75 ng/mL — can significantly improve symptoms |
| Dopamine agonists (pramipexole, ropinirole) | Effective but risk of 'augmentation' (worsening symptoms with long-term use) |
| Gabapentin/pregabalin | Alternative, especially if pain component or augmentation with dopamine agonists |
| Lifestyle measures | Regular sleep schedule, moderate exercise, avoiding triggers (caffeine, alcohol) |
Augmentation — A Key Treatment ComplicationLong-term use of dopamine agonists can paradoxically worsen RLS over time — symptoms start earlier in the day, spread to other body parts, and become more intense ('augmentation'). This is why current guidelines increasingly favour iron correction and alternative medications as first-line treatment.
Is restless legs syndrome a sleep disorder or a neurological condition?
It's classified as a neurological/sleep movement disorder — it significantly disrupts sleep but originates from dysfunction in brain dopamine and iron pathways rather than a primary sleep problem.
Can children get restless legs syndrome?
Yes, though it's less commonly recognised in children — it may present as 'growing pains' or be misdiagnosed as ADHD due to associated sleep disruption and daytime restlessness.
Will my RLS go away if I take iron supplements?
If ferritin is low (<75 ng/mL), iron supplementation often significantly improves or resolves symptoms over several months, though response varies between individuals.
Medical Disclaimer: This page is for general education only and does not replace professional medical advice. Always consult a qualified healthcare provider.