One of the most common complaints vein specialists hear: “My legs burn, ache, or throb at night — but feel fine in the morning.” If this sounds familiar, you are not alone, and the explanation is almost always circulatory.

Why Do My Legs Burn at Night? The Venous Connection Explained

Why Do Veins Cause Nighttime Burning?

Throughout the day, standing and walking keep blood moving upward through your leg veins with the help of calf muscle contractions. But as soon as you lie down and the day’s activity stops, that mechanical pump is gone. If your venous valves are leaky — a condition called chronic venous insufficiency (CVI) — blood pools in the lower leg veins, raising pressure and triggering the characteristic burning, heaviness, and restless leg sensation.

The mechanism is well understood: elevated venous pressure causes fluid to leak into surrounding tissue, creating inflammation around nerve endings. This inflammatory process is most noticeable at night because:

• The muscle pump is inactive
• There is no gravity-assisted drainage when horizontal
• Vasodilation from warmth (bed warmth) worsens pooling
• Neurological awareness is heightened without daytime distractions

Other Conditions That Cause Burning Legs at Night

While venous insufficiency is the most common culprit, your doctor may also consider:

• Peripheral neuropathy (diabetes, alcohol, vitamin B12 deficiency)
• Restless leg syndrome (RLS) — an uncontrollable urge to move the legs
• Peripheral arterial disease — arterial narrowing causing ischemic pain
• Sciatica or nerve compression from lumbar disc problems

A vein specialist differentiates these using clinical examination and duplex ultrasound. The key distinguishing feature of venous pain: it worsens after prolonged standing or sitting and improves with leg elevation.

When to See a Vein Specialist

You should book a consultation if you experience:

• Burning, aching, or throbbing legs at night on more than 2 nights per week
• Visible varicose or spider veins alongside the symptoms
• Leg swelling that is worse by evening
• Skin discolouration or hardening around the ankle
• Restless or cramp-like sensations that disrupt sleep

Diagnosis — Duplex Ultrasound

At Israel Vein Center, the initial consultation includes a colour duplex ultrasound performed in the same visit. This painless scan visualises blood flow direction in real time, maps the location and severity of reflux, measures vein diameters, and categorises severity using the CEAP classification (C0–C6). The scan takes 20–30 minutes and produces a written report the same day.

Treatment Options for Venous Insufficiency

Treatment is matched to the findings on duplex ultrasound:

• EVLA (endovenous laser ablation) — thermal closure of the great or small saphenous vein; eligible for tofes 17 kupat holim funding at Shamir Medical Center
• RFA (radiofrequency ablation) — similar to EVLA using radiofrequency energy; performed privately
• VenaSeal — medical adhesive that seals the vein without heat or tumescent anaesthesia
• Ultrasound-guided sclerotherapy — chemical closure of smaller tributaries
• Compression therapy — first-line conservative measure before procedures