Varicose vein treatment (laser, EVLA) (Endovenous laser ablation (EVLA) of varicose veins)

What is endovenous laser ablation (EVLA) for varicose veins?

Varicose veins are swollen, twisted veins, usually in the legs, that appear when the small valves inside a vein stop working and blood pools instead of flowing back to the heart. Endovenous laser ablation (EVLA), a type of endothermal ablation, is a keyhole way of treating them.

Using ultrasound to guide a needle, a thin laser fibre is passed inside the faulty vein. Heat from the fibre seals the vein closed from the inside, so blood reroutes through healthy deeper veins. There is no need to surgically strip the vein out. NICE recommends endothermal ablation (laser or radiofrequency) as the first treatment to offer for suitable varicose veins, ahead of foam sclerotherapy or surgery.

EVLA mainly treats the underlying faulty vein. Remaining surface bulges or thread veins may need a top-up treatment such as injections (sclerotherapy) or small removals (phlebectomy), either at the same time or later.

Types, options & approaches

There may be different ways to do this. The right approach depends on the clinical question and your circumstances.

Endothermal ablation vs foam vs surgery

All can be effective; the right choice depends on which vein is affected, its size and shape, and your circumstances. A vascular specialist should advise after an ultrasound scan.

Preparing for your procedure

• Have a duplex ultrasound scan first; treatment is planned around which veins are faulty.
• Discuss whether your veins are causing symptoms or are mainly cosmetic, as this affects NHS funding.
• Tell the team about blood-thinning medicines and any history of blood clots (DVT or PE).
• Mention if you are or might be pregnant; treatment is usually delayed until after pregnancy.
• Arrange suitable loose clothing and footwear to go over a compression stocking afterwards.
• Plan to be able to walk regularly afterwards, and arrange a lift home if you are having sedation.
• Ask whether surface bulges or thread veins will be treated at the same time or separately.

What happens

EVLA is usually done in a clinic or day-case unit under local anaesthetic, and takes around an hour. You lie on a couch and the leg is cleaned and scanned with ultrasound.

A needle is used to pass a thin laser fibre into the faulty vein. Local anaesthetic fluid is then injected along the vein (this is called tumescent anaesthesia and involves several small injections, which sting briefly). The fibre is slowly withdrawn while delivering heat that seals the vein. Surface veins may be injected or removed through tiny cuts at the same time.

A compression stocking or bandage is applied at the end. You can usually walk straight away and go home the same day, and you are encouraged to keep moving.

Is this procedure right for me?

A good consultation should explore whether it's the right choice for you now — including reasons to wait or consider something else.

Before you decide

Use this as a shared-decision checklist. The aim is not just “can this be done?”, but whether it is right for you, now, with the risks and alternatives clearly understood.

Comfort, sedation or contrast choices

If local anaesthetic, sedation, contrast or pain relief is used, ask what is planned, why, and what it means afterwards.

The most important risk to understand is a deep vein clot (DVT). It is uncommon, but you should know the warning signs and keep moving afterwards. Nerve irritation causing numbness is usually temporary but can occasionally persist, more so when veins below the knee are treated. Be aware too that varicose veins can recur over the years whatever treatment is used, and that thread veins and some bulges may need separate treatment.

Published figures to discuss

Reported success and complication rates vary with the vein treated, the device and settings used, operator experience, and how and when outcomes are measured. Most figures come from research series and meta-analyses; they are cautious guides, not promises, and many complications are minor and temporary.

These are literature figures, not a personalised prediction. Your own risks and likely benefits depend on your circumstances, your health, and how your care is carried out and followed up.

What happens afterwards

Most people are up and walking the same day. The main tasks are to keep moving, wear the compression stocking as advised, and expect bruising and tightness to settle over a few weeks.

• Bruising and tenderness along the treated vein for a few weeks
• A tight, pulling or cord-like feeling over the sealed vein
• Temporary brown staining or lumpiness of the skin over the vein
• Mild aching eased by walking and simple painkillers

Aftercare

• Wear the compression stocking exactly as advised by your team.
• Walk regularly and keep your leg moving to lower the risk of clots.
• Avoid long periods of standing still, and avoid very strenuous exercise early on.
• Take simple painkillers such as paracetamol for aching; avoid aspirin unless advised.
• Keep needle and cut sites clean and dry until healed.
• Raise the leg when resting to help reduce swelling.
• Attend any follow-up scan to check the vein has sealed.
• Know the warning signs of a clot and who to contact urgently.

• Compression stocking fitted and instructions understood
• Loose clothing and footwear that fit over the stocking
• Plan to walk regularly each day
• Paracetamol at home
• Lift home arranged if you are having sedation
• Follow-up scan or review appointment noted
• Clinic's contact number saved in case of a suspected clot

Scars and how they heal

EVLA is done through needle punctures rather than cuts, so it does not usually leave surgical scars. Expect small puncture marks, bruising and sometimes brown staining along the line of the treated vein, which fade over weeks to months. If small bulging veins are removed through tiny cuts (phlebectomy) at the same time, these leave very small marks that usually become hard to see.

⚠ Get urgent help if…

• A hot, painful, swollen calf or leg (possible deep vein clot)
• Sudden breathlessness or chest pain (seek emergency help)
• Spreading redness, increasing pain, pus or fever (possible infection)
• A blistering or breaking skin burn over the treated vein
• New numbness or weakness that is getting worse
• Bleeding from a treatment site that will not stop

Who to contact: your clinician, clinic or test provider first (keep their number to hand). For urgent advice when you can't reach them, call NHS 111. In an emergency, call 999.

General guidance — it doesn't replace the specific advice your surgeon gives you.

Results & realistic expectations

A good result is a sealed faulty vein, with less aching, heaviness and swelling, and often a better-looking leg. Symptoms frequently improve within a few weeks, while bruising and skin staining take longer to settle. Endothermal ablation closes the target vein successfully in the large majority of cases.

Treatment cannot guarantee that all visible veins disappear, and thread veins or surface bulges may need separate treatment. It also cannot stop new varicose veins forming, so some people need further treatment over the years.

Sealing the faulty vein gives lasting relief for many people, but varicose veins are a long-term tendency and can return. Studies suggest a meaningful proportion of people develop some recurrence over about five years, whatever method is used. Keeping active, managing weight and using compression where advised may help; further treatment is straightforward if veins come back.

Related tests, treatments or support

EVLA is often combined with treatment of the surface veins — ultrasound-guided foam sclerotherapy or phlebectomy — either at the same session or as a planned follow-up. Thread (spider) veins usually need separate microsclerotherapy and are often regarded as cosmetic. Your specialist will set out the whole plan after the ultrasound scan.

Follow-up & long-term care

You may be offered a follow-up duplex ultrasound (often around 6 weeks) to confirm the vein has sealed and to plan any top-up treatment of remaining veins. You will be told who to contact urgently if you have signs of a clot, infection or a skin burn.

Repeat, follow-on and what comes next

• Some veins do not fully seal, or recanalise later, and need a repeat ablation or foam treatment.
• Remaining surface bulges or thread veins often need separate treatment.
• New varicose veins can develop over the years and may need further treatment.
• A follow-up ultrasound scan is often used to check the result and plan any top-up.

Ask what happens if the result is unclear or needs repeating, and what is included if further tests or follow-up are needed.

What good aftercare looks like

• Clear advice on compression, walking and avoiding long periods of standing still.
• A follow-up ultrasound scan to confirm the vein has sealed and plan any further treatment.
• Written warning signs for a clot, infection or skin burn, with an urgent contact route.
• An honest plan for treating remaining veins and for the possibility of recurrence.

What affects the cost

Costs vary a great deal between people and providers, and we don't publish prices. What matters is understanding what drives the cost and making sure your quote is complete. The main things that affect it:

• The duplex ultrasound scan and assessment
• The operator's fee and their experience
• The clinic or day-case facility fee
• Whether one or both legs, and how many veins, are treated
• Any added treatments such as foam sclerotherapy or phlebectomy
• Compression stockings and follow-up scans
• Whether thread (spider) veins, often cosmetic, are treated

• Whether the diagnostic ultrasound scan is included
• The operator and facility fees
• How many veins and which legs are covered by the price
• Whether top-up treatments (foam or phlebectomy) and stockings are included
• Follow-up scans and review appointments
• What happens, and what it would cost, if the vein does not fully seal or veins recur
• The cancellation and rebooking policy

On the NHS? Varicose vein treatment is available on the NHS when veins cause symptoms or complications such as skin changes, bleeding or ulcers; treatment for appearance alone is usually arranged privately.

You're entitled to your total cost in writing — including reports, follow-up and what happens if the result is inconclusive — before you decide.

Consent traps and marketing red flags

These are not small details. They are often where patients lose choice, time to reflect, or realistic expectations.

Choosing a specialist safely

• Check the surgeon is on the GMC Specialist Register for this area.
• Make sure they work at a CQC-registered service, and look for membership of the relevant Royal College or professional body.
• You're entitled to time to consider and to have your questions answered before you agree — the surgeon who looks after you should explain it, not a salesperson.
• Be wary of pressure: time-limited offers or deposits taken before you've had time to think are red flags, not bargains.
• You're entitled to your total cost in writing — including any follow-up — before you decide.

How Vuemedics verifies every consultant →

Take this to your consultation. A good surgeon will welcome every one of these.

• Which vein is faulty on my ultrasound scan, and why is laser ablation the right option for me?
• Will surface veins or thread veins be treated at the same time, separately, or not at all?
• How long should I wear compression and when can I return to work and exercise?
• What are your success and recurrence rates, and how do you reduce the risk of a clot?
• What follow-up scan will I have, and what happens if the vein does not fully seal?
• Are you on the GMC Specialist Register for this area, and which Royal College or professional body are you a member of?
• Will you be the surgeon who carries out my procedure, and who looks after me afterwards?
• What are the risks for someone like me, and how often do your own patients have a problem or need it repeated or redone?
• What does a realistic result look like — and what can this procedure not achieve?
• What are my options, including waiting, doing nothing for now, or choosing a different approach?
• Can I have written information, results and aftercare instructions in a format I can use, including any accessibility or communication support I need?
• What is the total cost in writing, including any follow-ups, and how much time do I have to decide?

Find a verified surgeon for varicose vein treatment (laser, evla)

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How we made this page

Medically reviewed by a GMC-registered consultant. Written in plain English, checked against NHS, NICE, GMC and relevant Royal College / specialist-society guidance, and kept under review. No clinic paid to appear on this page, and we publish no pricing. This is general information to help you prepare — it is not a substitute for advice from your own clinician. How we review our guides →

Source hierarchy: UK regulator and NHS/NICE guidance first, then relevant Royal College or specialist-society guidance, then peer-reviewed evidence for procedure-specific figures where available.

Sources & standards: NICE CG168 — Varicose veins: diagnosis and management NHS — Varicose veins: treatment Circulation Foundation — Patient information (veins) NICE IPG52 — Endovenous laser treatment of the long saphenous vein Evaluation of endovenous laser ablation in varicose veins — PMC Endovenous laser ablation: systematic review and meta-analysis — Springer

Reviews reflect patients' experience of care, not clinical outcomes. For procedure volumes and outcome data see PHIN.

Last medically reviewed 2026-09-21. Spotted something wrong or out of date? Report an error in this guide.