Restless Legs at Night: When It's Actually a Circulation Problem

Restless legs at night are usually treated as a neurological problem, but for a meaningful share of patients, the real driver is vascular: chronic venous insufficiency, peripheral artery disease, or a combination of both. This guide explains when restless legs point to a circulation problem, how to distinguish it from classic restless leg syndrome, and how we sort it out in a single visit at Healthy Living Heart and Vein.

Most patients with restless legs are handed a prescription and sent home. That works for some. For others, particularly adults over 50 with visible varicose veins, evening heaviness, or a smoking history, the restless legs are a symptom of a vein or artery problem that will not resolve until the underlying circulation issue is addressed.

Classic restless leg syndrome vs vascular restless legs

Classic restless leg syndrome (RLS) is a neurological condition. It causes an uncomfortable urge to move the legs, typically worse in the evening and at rest, and movement provides temporary relief. It is associated with iron deficiency, kidney disease, pregnancy, and certain medications. It usually responds to iron replacement (if deficient), dopamine agonists, or anticonvulsants.

Vascular restless legs, by contrast, are driven by circulation problems in the legs. Chronic venous insufficiency causes an aching heaviness and an urge to move that eases with elevation and worsens with prolonged standing. Peripheral artery disease can cause an aching or burning discomfort at rest, often at night, and dangling the leg off the bed helps because gravity pushes blood into the calf.

Distinguishing the two matters because the treatment is completely different. Neurology medications will not fix vein reflux or a narrowed artery. Compression stockings or vein ablation will not fix classic RLS. Getting the diagnosis right is where the workup starts.

Cause #1: chronic venous insufficiency

Chronic venous insufficiency is the leading vascular cause of restless legs we see in clinic. When the one-way valves inside the leg veins stop closing properly, blood pools in the lower leg. Pressure builds through the day, and by evening the calves feel heavy, achy, and restless. Lying down partly relieves the pressure, but the discomfort often does not fully resolve until early morning.

Clues that point toward venous insufficiency include:

• Visible varicose veins or spider veins
• Ankle swelling that improves overnight
• Leg heaviness or aching by the end of the day, especially after standing
• Relief when the legs are elevated above the heart
• Family history of vein disease

Diagnosis is confirmed with venous Doppler ultrasound, a painless in-office test that maps blood flow through the leg veins and identifies where reflux is happening. Treatment ranges from compression therapy to vein ablation, which closes the failing vein and redirects blood through healthy channels.

Cause #2: peripheral artery disease

Advanced PAD can cause nighttime leg discomfort that patients describe as restless or achy. When arteries are significantly narrowed, blood flow to the calf and foot drops when you lie down because gravity is no longer helping. The muscle tissue starts complaining, and the urge to move (or dangle the leg off the bed) is the body's way of asking for more blood flow.

A distinctive feature of PAD-related restless legs is that walking, ironically, does not fully relieve the discomfort the way it does classic RLS. Walking briefly may help by redistributing blood, but the pattern is different: with classic RLS the discomfort is neurological and eases with any movement, while with PAD the discomfort returns as soon as the muscle demand outstrips supply.

If you have PAD risk factors (smoking history, diabetes, high blood pressure, high cholesterol) and restless legs at night, an ankle-brachial index test is worth doing.

Cause #3: iron deficiency (the crossover)

Iron deficiency is a well-established cause of classic RLS. It also travels alongside vascular disease in adults over 50, particularly women. A basic iron panel (serum ferritin, transferrin saturation) is a low-cost part of any restless legs workup. If ferritin is low, iron replacement can meaningfully reduce symptoms, sometimes on its own.

Cause #4: medications that trigger it

Several common medications can trigger or worsen restless legs, including certain antihistamines (diphenhydramine), some antidepressants (particularly SSRIs), antipsychotics, and dopamine-blocking anti-nausea drugs. If your restless legs started within weeks of a new prescription, flag it. Do not stop the medication on your own; a switch is often possible.

How to tell if your restless legs are vascular

Ask yourself these questions. The more yes answers you have, the more likely a vascular workup is warranted:

• Do you have visible varicose veins?
• Do your legs feel heavy or achy by the end of the day?
• Does elevating the legs help more than walking does?
• Do you have ankle swelling that improves overnight?
• Do you have PAD risk factors (smoking history, diabetes, high blood pressure)?
• Have RLS medications not fully resolved your symptoms?

The workup at HLHV

Our restless legs workup covers all the common causes in a single visit:

• Detailed history including timing, triggers, current medications, and family history
• Physical exam checking for varicose veins, skin changes, and pulses in the feet
• Venous Doppler ultrasound to look for reflux and chronic venous insufficiency
• Ankle-brachial index to screen for peripheral artery disease
• Basic labs including iron panel and kidney function

Most patients leave the first visit with a working diagnosis. If the workup identifies vascular contribution, we build a treatment plan that goes after the underlying problem, not just the symptom. Our PAD page walks through the vascular workup in detail.

Simple things to try while you wait for your appointment

While you are waiting for an evaluation, a few simple steps often reduce restless legs symptoms:

• Wear graduated compression stockings during the day (15-20 mmHg is a common starting point)
• Elevate your legs 10-15 minutes before bed
• Stretch the calves gently before sleep
• Cut back on caffeine after mid-afternoon
• Note any new medications and any triggers you notice

Frequently Asked Questions

Can restless legs be caused by circulation problems?

Yes. Chronic venous insufficiency and peripheral artery disease can both cause restless legs at night. When restless legs are treated with neurology medications and do not fully resolve, or when varicose veins and evening heaviness are also present, a vascular workup is worth doing.

Are restless legs related to varicose veins?

A meaningful share of patients with varicose veins also experience restless legs, and treating the underlying vein reflux with compression or vein ablation often reduces the restless legs. A venous Doppler ultrasound identifies whether reflux is present.

How do I know if my restless legs are neurological or vascular?

Vascular restless legs typically improve with leg elevation, are worse after standing, and are accompanied by visible varicose veins, ankle swelling, or PAD risk factors. Classic restless leg syndrome is relieved by movement (walking, stretching) and is often tied to iron deficiency or a family history.

Do compression stockings help restless legs?

If chronic venous insufficiency is contributing to your restless legs, compression stockings during the day often reduce evening and nighttime symptoms noticeably. They will not help if the cause is purely neurological.

When should I see a cardiologist for restless legs?

See a cardiologist or vein specialist when restless legs come with visible varicose veins, evening heaviness, ankle swelling, or PAD risk factors, or when standard restless leg medications have not fully resolved symptoms. HLHV evaluates all vascular contributors in a single visit.

Rajesh Ramineni, MD, FACC, FSCAI

A Fellow of both the American College of Cardiology and SCAI, Dr. Ramineni evaluates peripheral vascular disease as part of a comprehensive cardiovascular workup that includes ankle-brachial index, Doppler ultrasound, and labs in a single visit. He built this practice on the belief that world-class intervention belongs in the community, not just the medical center.