Restless Legs Syndrome Diagnosis and Management

Diagnostic Criteria

The American Academy of Sleep Medicine recommends that a diagnosis of Restless Legs Syndrome (RLS) be made based on five essential diagnostic criteria, including an urge to move the legs, worsening with rest, relief with movement, a circadian pattern, and not being explained by another condition 1, 2
The urge to move the legs is usually accompanied by uncomfortable or unpleasant sensations, such as a "crawling" sensation 1, 3
Symptoms begin or worsen during periods of inactivity, such as sitting or lying down after being on her feet all day 1
Symptoms are partially or totally relieved by walking or stretching, at least as long as the activity continues 1
Symptoms occur or worsen in the evening or night compared to daytime 1

The American Academy of Sleep Medicine states that several conditions can superficially meet RLS criteria but are distinct entities, including venous stasis, peripheral neuropathy, vascular disease, arthritis, and positional discomfort 1, 2
Venous stasis is a critical mimic to exclude, particularly in patients with a history of prolonged standing 1, 3, 4
Peripheral neuropathy should be considered, and a thorough neurological examination should be performed to identify sensory deficits or radiculopathy 3, 4

The American Geriatrics Society recommends checking serum ferritin immediately, as iron deficiency is a critical secondary cause of RLS 3, 4, 5
Ferritin levels less than 50 ng/mL are consistent with RLS diagnosis and indicate a need for iron supplementation 3, 4

The American Geriatrics Society recommends starting with iron supplementation if ferritin levels are less than 50 ng/mL 3, 4
Dopamine receptor agonists, such as ropinirole and pramipexole, are first-line treatments for RLS 3, 4
Ropinirole should be started at 0.25 mg orally 1-3 hours before bedtime and increased to 0.5 mg after 2-3 days, then 1 mg after 7 days, with weekly titration by 0.5 mg increments to a maximum of 4 mg 3, 4
Pramipexole should be started at 0.125 mg orally 2-3 hours before bedtime and doubled every 4-7 days to a maximum of 0.5 mg 3, 4

The American Academy of Sleep Medicine warns against missing iron deficiency, overlooking venous stasis, using levodopa-carbidopa, abruptly discontinuing dopaminergic therapy, and ignoring medication review 1, 2, 3, 4, 5
Iron deficiency should be checked even if hemoglobin is normal, and ferritin levels should be monitored regularly 3, 4, 5

Venous stasis should be ruled out – assess for a history of prolonged standing, visible varicosities, peripheral edema, and other signs of venous insufficiency when evaluating a patient with suspected RLS. The American College of Cardiology recommends this assessment as a critical step before confirming the diagnosis. 6
Peripheral arterial disease (PAD) must be excluded – palpate the femoral, popliteal, dorsalis pedis, and posterior tibial pulses bilaterally; the absence of all four distal pulses is indicative of PAD and should prompt further vascular evaluation. The American College of Cardiology includes this pulse‑check in the RLS work‑up. 6
Spinal stenosis is a potential mimic – consider this diagnosis when bilateral leg symptoms are accompanied by pain radiating down the legs, relief with lumbar flexion (rather than just standing), and possible motor weakness. The American College of Cardiology advises clinicians to differentiate spinal stenosis from true RLS. 6

Circadian pattern, normal exam, and dopaminergic response – true RLS characteristically shows an evening/night predominance, an unremarkable physical examination, and marked symptom improvement with dopaminergic agents, which helps separate it from conditions such as arthritis (which lacks a circadian rhythm and shows joint abnormalities) or PAD (which presents with abnormal pulses and claudication). The American College of Cardiology highlights these features as essential for accurate diagnosis. 6