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Endovenous Laser Treatment (EVLT) for Varicose Veins

Typical recovery: Walking is encouraged on the day of treatment, and light routine activity can usually be resumed immediately or the following day. Many patients return to desk-based work within a few days. Bruising, tightness or tenderness may persist for one to two weeks, while improvement in visible varicosities and venous symptoms continues over the following weeks to months.

Key points

  • EVLT treats the underlying refluxing superficial truncal vein; it is not simply a cosmetic laser treatment applied to the skin.
  • Duplex ultrasound is essential for confirming the source and extent of venous reflux and for planning treatment.
  • Not every visible varicose vein requires EVLT. Treatment is selected according to symptoms, duplex findings, anatomy, complications and patient preference.
  • For suitable patients with symptomatic great or small saphenous vein reflux, contemporary guidelines favour endovenous ablation over conventional high ligation and stripping.
  • EVLT and radiofrequency ablation are both established endovenous thermal techniques. Neither should be presented as universally superior for every patient.
  • The procedure is usually performed using ultrasound guidance and tumescent local anaesthesia, with or without additional sedation according to the patient and treatment setting.
  • The abnormal vein is closed internally rather than physically pulled out of the leg. It subsequently fibroses while venous return continues through other healthy veins.
  • Visible tributary varicosities may shrink after treatment of the refluxing trunk but may still require phlebectomy or sclerotherapy.
  • A prolonged mandatory trial of compression stockings is not required by contemporary guidelines when symptomatic truncal reflux is confirmed, the patient is an appropriate candidate for intervention and wishes to proceed.
  • If compression is prescribed after thermal ablation, it is generally used for a short period, commonly around one week, rather than indefinitely.
  • Venous thromboembolism risk should be assessed before treatment. Additional thromboprophylaxis is considered for selected higher-risk patients rather than given routinely to everybody.
  • Routine early post-treatment duplex scanning is not required by some contemporary guidelines in an asymptomatic average-risk patient after uncomplicated thermal ablation; however, early ultrasound is appropriate when symptoms develop, risk is increased or the treating clinician's protocol requires it.
  • Varicose veins can recur after successful treatment because of recanalisation of the treated vein or development of reflux in other veins. Recurrence does not necessarily mean that the original procedure was performed incorrectly.

Overview

Endovenous laser treatment (EVLT), also called endovenous laser ablation (EVLA), is a minimally invasive procedure used to treat selected patients with symptomatic varicose veins caused by reflux in a superficial truncal vein, most commonly the great or small saphenous vein. Duplex ultrasound is used before treatment to identify the source and extent of venous reflux and to plan the procedure. Under ultrasound guidance, a thin catheter and laser fibre are introduced into the abnormal vein. Local tumescent anaesthetic is placed around the vein to provide anaesthesia and protect surrounding tissues, and laser energy is then delivered while the fibre is withdrawn, causing the vein to close. Blood continues to return through healthy veins, while the treated vein gradually fibroses and is no longer part of the abnormal reflux pathway. EVLT usually avoids the larger incisions and surgical stripping used in conventional vein surgery. Visible branch varicosities may improve after treatment of the refluxing trunk, but some patients also require phlebectomy or sclerotherapy either during the same treatment episode or later. Most patients can walk shortly after the procedure and return home the same day.

Signs & symptoms

  • Aching, heaviness or tiredness in the leg associated with varicose veins.
  • Pain, throbbing, burning or itching around visible varicose veins.
  • Ankle or lower-leg swelling that worsens with prolonged standing.
  • Prominent varicose veins associated with confirmed superficial venous reflux on duplex ultrasound.
  • Skin pigmentation, venous eczema or other skin changes caused by chronic venous hypertension.
  • Episodes of superficial thrombophlebitis involving varicose veins.
  • Bleeding from a superficial varicose vein.
  • A healed or active venous leg ulcer associated with treatable superficial venous reflux.

What the procedure involves

  1. 1

    Clinical assessment and duplex Doppler ultrasound to map the superficial and deep venous systems, confirm the refluxing vein and plan treatment.

  2. 2

    The course of the target vein and important tributaries is identified using ultrasound, usually with the patient positioned appropriately for venous assessment.

  3. 3

    The target superficial vein is entered through a needle puncture under ultrasound guidance and a guidewire or catheter is advanced inside the vein.

  4. 4

    The laser fibre is positioned at the planned starting point under ultrasound guidance, with appropriate distance from the deep-vein junction according to the anatomy and technique being used.

  5. 5

    Tumescent local anaesthetic is infiltrated around the vein. This provides anaesthesia, compresses the vein around the fibre and helps protect surrounding tissue from heat.

  6. 6

    Laser energy is delivered while the fibre is progressively withdrawn, producing controlled thermal injury to the vein wall and closure of the refluxing vein.

  7. 7

    The treated segment is reassessed with ultrasound as appropriate and the puncture site is covered with a small dressing.

  8. 8

    Visible tributary varicosities may be treated with phlebectomy or sclerotherapy during the same session when appropriate, or they may be reassessed and treated later.

  9. 9

    Compression may be applied according to the individual treatment protocol.

  10. 10

    The patient is encouraged to walk soon after treatment and can usually return home the same day after routine observation.

Preparation

  • Bring the duplex Doppler report and images if the scan was performed elsewhere.
  • Tell the treating surgeon about previous deep-vein thrombosis, pulmonary embolism, superficial thrombophlebitis or previous varicose-vein procedures.
  • Bring a complete medication list, particularly anticoagulants, antiplatelet medicines, hormonal treatment and other medicines that may influence bleeding or thrombosis risk.
  • Do not stop blood thinners or other prescribed medicines on your own; any alteration should be specifically advised by the treating clinician.
  • Tell the clinician about significant peripheral arterial disease, reduced mobility, previous vascular surgery or other conditions affecting circulation in the leg.
  • Mention pregnancy or the possibility of pregnancy. Interventional treatment for varicose veins is generally deferred during pregnancy except in unusual circumstances.
  • Tell the team about allergies or previous reactions to local anaesthetic, dressings, adhesive materials or medications.
  • Discuss your individual risk of deep-vein thrombosis and whether any additional thromboprophylaxis or post-treatment ultrasound is required.
  • Follow the specific fasting instructions given by the treatment facility. Procedures performed under local anaesthesia alone may have different requirements from those using sedation.
  • Arrange transport or an accompanying person if sedation is planned or if advised by the treating facility.
  • If compression stockings are to be used after treatment, obtain the correct type and size according to the clinician's instructions.

Recovery and aftercare

  • Walking is encouraged soon after EVLT and regularly during the first days. Prolonged unnecessary bed rest should be avoided.
  • Mild bruising, pulling, tightness or tenderness along the treated vein is common and may last for several days or occasionally a few weeks.
  • Use simple pain relief or other medication as advised by the treating clinician.
  • Keep puncture or phlebectomy sites clean and follow the dressing and bathing instructions given at discharge.
  • If compression stockings or bandaging are prescribed, use them for the advised duration. Contemporary protocols commonly use short-term compression rather than prolonged routine use after uncomplicated ablation.
  • Resume normal walking and light daily activities according to comfort. Many people can return to desk-based work within a few days.
  • Increase exercise progressively. Very strenuous exercise can be delayed for a short period if it causes significant discomfort, according to the treating clinician's advice.
  • Avoid prolonged immobility. If a long journey or flight is planned soon after treatment, discuss this beforehand if you have additional thrombosis risk factors.
  • Do not ignore new calf swelling, significant worsening pain or breathlessness; these require prompt assessment for venous thromboembolism.
  • Attend follow-up as advised. Early duplex ultrasound is particularly important if symptoms suggest thrombosis or if you are considered at increased thrombotic risk.
  • Residual visible branch varicosities may gradually become less prominent after the main refluxing vein has been treated. Persistent symptomatic tributaries can be treated later with phlebectomy or sclerotherapy when appropriate.

Risks and possible complications

  • Temporary pain, soreness, tightness or tenderness along the treated vein.
  • Bruising or a small haematoma around puncture or phlebectomy sites.
  • Superficial thrombophlebitis or a painful inflammatory reaction in a superficial vein.
  • Temporary skin pigmentation, induration or a palpable cord along the course of the treated vein.
  • Temporary numbness, tingling or altered sensation caused by irritation of a nearby sensory nerve; this risk is more relevant when treating veins in parts of the calf where nerves lie close to the vein.
  • Skin burn or thermal injury, which is uncommon when appropriate technique and tumescent protection are used.
  • Thrombus extension from the treated superficial vein towards the deep venous system, sometimes termed ablation-related thrombus extension.
  • Deep-vein thrombosis, which is uncommon but can require anticoagulant treatment.
  • Pulmonary embolism, which is rare but potentially serious.
  • Infection of a puncture or phlebectomy site, which is uncommon.
  • Failure of complete vein closure or later recanalisation of the treated segment.
  • Persistence or recurrence of varicose veins because of residual tributaries, new venous reflux or progression of chronic venous disease.
  • Need for additional treatment such as phlebectomy, sclerotherapy, repeat ablation or another venous procedure.

When to arrange prompt medical assessment

  • Pain, bruising or tightness that is increasing rather than gradually settling during the days after treatment.
  • A painful hard cord, increasing tenderness or inflammation along a superficial vein, which may represent superficial thrombophlebitis.
  • Increasing redness, warmth, swelling or discharge around the puncture or phlebectomy sites.
  • New persistent numbness, burning or altered sensation in the treated leg.
  • Persistent or recurrent varicose-vein symptoms after the expected recovery period, because residual tributaries or recurrent reflux may need reassessment.

When to go to an emergency department now

  • Sudden significant swelling and pain of the calf or whole leg, particularly if it is new after the procedure, because deep-vein thrombosis must be excluded.
  • New shortness of breath, chest pain, coughing blood, fainting or unexplained rapid deterioration, which may indicate pulmonary embolism.
  • Severe rapidly worsening leg pain or swelling accompanied by marked colour change of the foot or leg.
  • Persistent significant bleeding that does not stop with firm direct pressure.
  • High fever or marked systemic illness together with rapidly spreading redness or swelling of the treated leg.

Myth vs fact

Frequently asked questions

Sources

Medically reviewed by Dr. Shams Alam Mohammed Tahir, MBBS, MS (General Surgery). Last reviewed 2026-09-17.

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