Varicose Vein Treatment Options Explained: Sclerotherapy, Laser, Radiofrequency, Adhesive, Stripping and Phlebectomy — With the Trial Data

A new diagnosis of varicose veins usually comes with the same three questions: Do I really need treatment? What are the options? Will there be scars?

Treatment has changed substantially over the past fifteen years. Most procedures are now done through a needle puncture under local anaesthesia, and most patients go home the same day; whether observation or admission is needed is decided individually. This article sets out each current option — and, because a list of techniques is not much use without numbers, what the randomised trials say about how they compare.

Before any treatment: duplex ultrasound

Which treatment suits you cannot be decided by looking at the leg. The essential test is duplex ultrasound, which maps where reflux is occurring, how severe it is, and the diameter of the refluxing vein. The 2011 Society for Vascular Surgery / American Venous Forum guideline makes this its first and strongest recommendation — duplex scanning of the deep and superficial veins for every patient with varicose veins (GRADE 1A) — and the updated 2022 guideline from the same societies opens with the same point. Planning treatment from the visible veins alone is not acceptable practice.

---

Option 1. Sclerotherapy

A sclerosant — a drug that irritates the vein lining — is injected directly into the vein, which closes and is absorbed. It is one of the oldest treatments in venous medicine and remains very useful for particular vein types.

Today the sclerosant is usually mixed with gas into foam, which displaces blood and contacts more of the vein wall than liquid, so less drug is needed. Under ultrasound guidance (UGFS) it can also reach veins that are not visible on the surface.

Best suited to: spider veins, reticular veins, small-vessel recurrences after previous treatment, and some small saphenous vein reflux.

Advantages: needle only, no incision, 20–30 minutes, back to normal activity the same day.

What the evidence says about its limits: as the sole treatment for a refluxing great saphenous trunk, foam does not hold up as well as the other options. In the Danish four-arm randomised trial (Rasmussen et al., British Journal of Surgery, 2011; 500 patients), the great saphenous vein was still open and refluxing at one year in 16.3% after foam versus 4.8–5.8% after laser, radiofrequency or stripping. At fourteen years in the Helsinki trial, anatomical recurrence was 30.8% after foam versus 2.6–6.1% after the others. It has a role; it is not the first choice for a large refluxing trunk.

---

Option 2. Endovenous thermal ablation — laser (EVLA) and radiofrequency (RFA)

These are the international standard for a refluxing saphenous trunk. A thin catheter is passed into the vein through a needle puncture, and heat delivered from inside seals the vein permanently.

Endovenous laser ablation (EVLA). An optical fibre is threaded into the vein and withdrawn slowly while emitting laser energy, closing the wall along its length. Current practice favours 1470 nm wavelength and radial-emitting fibres; Almeida and colleagues showed in 2009 that 1470 nm achieves closure at far lower energy than 980 nm, with markedly less pain and bruising. (We have written separately about the science of laser wavelengths — the short version is that operator technique matters more than the wavelength number.)

Radiofrequency ablation (RFA). Radiofrequency current heats the vein wall to around 120 °C, in 7 cm segments, using a device such as ClosureFast. Heat delivery is even and easy to control. In the Rasmussen trial, RFA had the lowest post-procedure pain score of the four treatments (1.21 on a 10-point scale, versus 2.58 for laser and 2.25 for stripping) and the fastest return to normal function (median 1 day).

What EVLA and RFA share

• Performed under tumescent local anaesthesia — no general anaesthetic
• A 1–2 mm needle puncture, no incision
• 30–60 minutes; walking the same day, with discharge or observation decided on the patient's condition
• Effective for great and small saphenous reflux
• Long-term results equivalent to stripping: at fourteen years, 6.1% recurrent reflux after laser versus 2.6% after stripping, with quality of life indistinguishable between arms (Rahman et al., 2026); pooled across 27 randomised trials, anatomic success is the same as surgery, with half the risk of nerve injury (RR 0.47; Sayarer et al., 2026)
• Compression stockings afterwards for about a week — the 2018 international consensus limits the recommendation after saphenous procedures to the first post-interventional week, and a randomised trial found that wearing them for 7 days rather than 48 hours reduced pain in that first week (Bakker et al., 2013)
• Clot risk is low but not zero: in a Japanese survey of 43,203 laser ablations, pulmonary embolism occurred in 0.0067% (Nemoto et al., 2019)

The 2011 SVS/AVF guideline recommends thermal ablation over high ligation and stripping for the incompetent great saphenous vein. The CLASS trial (Brittenden et al., New England Journal of Medicine, 2014; 798 patients, 11 UK centres) found procedural complications in 1% after laser versus 7% after surgery and 6% after foam, with similar clinical success across all three.

---

Option 3. Non-thermal, non-tumescent — cyanoacrylate adhesive and mechanochemical ablation

Cyanoacrylate closure (VenaSeal) seals the vein with a medical adhesive delivered through a catheter; it polymerises on contact with blood. Because no heat is used, no tumescent anaesthesia is needed — the multiple injections along the vein that patients find the most uncomfortable part of thermal treatment are eliminated — and there is no requirement for compression stockings afterwards.

In the VeClose randomised trial (Morrison et al., 2015; 222 patients), three-month closure was 99% for adhesive versus 96% for radiofrequency, with less bruising at day 3. At five years, freedom from recanalisation was 91.4% versus 85.2%, with no long-term device-related serious adverse events. The trade-offs: a local inflammatory reaction around the treated vein (CHAIR) is reported in 0.3–25.4% of patients depending on the series, mostly mild; the cost is higher than thermal ablation; and ten-year data do not yet exist. We have addressed one persistent myth about it — that it cannot be used in women of childbearing age — in a separate article.

Mechanochemical ablation (MOCA — ClariVein, Flebogrif) combines a rotating wire or cutting element that abrades the vein lining with simultaneous injection of sclerosant. Also non-thermal and non-tumescent. In a randomised trial against radiofrequency (Bootun et al., 2016; 119 patients), maximum intra-procedural pain was 19 mm versus 35 mm on a 100 mm scale, with the same one-month occlusion rate (92%).

---

Option 4. High ligation and stripping

The traditional operation: through a small groin incision, the great saphenous vein is tied off where it joins the deep vein, and the trunk is physically removed with a stripper. For decades it was the standard; endovenous methods have largely replaced it.

Advantages: the diseased vein is physically removed, long-term anatomical recurrence is very low (2.6% at fourteen years in the Helsinki trial), and the cost is comparatively low.

Disadvantages: conventionally it requires spinal or general anaesthesia and an inpatient stay, with more bruising, pain and scarring and a longer recovery. Groin dissection carries a risk of saphenous nerve injury and altered sensation. It is now mainly reserved for cases where endovenous treatment is not feasible — a very tortuous vein, or one containing thrombus.

One honest qualification: when stripping is performed under tumescent local anaesthesia as a day case, as in Rasmussen's trials, its recovery profile is closer to the endovenous methods than the traditional picture suggests (return to work 7.6 versus 7.0 days in the 2007 laser-versus-stripping trial). The anaesthetic and the setting drive much of the difference.

---

Option 5. Ambulatory phlebectomy

Under local anaesthesia, the visible, bulging tributary veins near the skin surface are hooked out through 2–3 mm stab incisions — hence the alternative name, stab avulsion. Endovenous treatment closes the source vein (the saphenous trunk); phlebectomy removes the branches that have already become varicose. The two are commonly performed in the same session — we have reviewed the evidence for doing them together separately.

The 2022 SVS/AVF/AVLS guideline explicitly addresses concomitant versus staged treatment of tributaries. And phlebectomy is a good example of an older technique whose evidence base holds up against newer alternatives — a point we have made here.

---

Choosing between them

The governing principle is that no single method suits every patient. The choice depends on which vein is refluxing and where, its diameter, the severity of reflux, any skin changes or complications, the patient's age and general health, and cost.

As a general framework:

• Great or small saphenous reflux → endovenous laser or radiofrequency as first line; adhesive or mechanochemical ablation where avoiding tumescent anaesthesia or compression matters to the patient
• Large tributary varicosities alongside → phlebectomy in the same session
• Spider and reticular veins → sclerotherapy
• Endovenous access not possible → stripping

In closing

There is no need to fear varicose vein treatment as "surgery" in the old sense. Almost every current option is done under local anaesthesia and most patients go home the same day — though the need for observation or admission is judged individually — and in trained hands complication rates are low — 1% for laser in the largest UK trial. What matters is an accurate duplex diagnosis and a treatment matched to it. Untreated, the condition progresses; if you have symptoms, a consultation is worth having sooner rather than later.

---

References

• Gloviczki P, Comerota AJ, Dalsing MC, et al. The care of patients with varicose veins and associated chronic venous diseases: clinical practice guidelines of the Society for Vascular Surgery and the American Venous Forum. J Vasc Surg. 2011;53(5 Suppl):2S-48S. (PMID: 21536172)
• Gloviczki P, Lawrence PF, Wasan SM, et al. The 2022 Society for Vascular Surgery, American Venous Forum, and American Vein and Lymphatic Society clinical practice guidelines for the management of varicose veins of the lower extremities. Part I. J Vasc Surg Venous Lymphat Disord. 2023;11(2):231-261.e6. (PMID: 36326210)
• Rasmussen LH, Lawaetz M, Bjoern L, et al. Randomized clinical trial comparing endovenous laser ablation, radiofrequency ablation, foam sclerotherapy and surgical stripping for great saphenous varicose veins. Br J Surg. 2011;98(8):1079-87. (PMID: 21725957)
• Rasmussen LH, Bjoern L, Lawaetz M, et al. Randomized trial comparing endovenous laser ablation of the great saphenous vein with high ligation and stripping in patients with varicose veins: short-term results. J Vasc Surg. 2007;46(2):308-15. (PMID: 17600655)
• Brittenden J, Cotton SC, Elders A, et al. A randomized trial comparing treatments for varicose veins. N Engl J Med. 2014;371(13):1218-27. (PMID: 25251616)
• Rahman T, Noronen K, Vähäaho S, Halmesmäki K, Venermo M. Fourteen Year Outcomes of a Randomised Controlled Trial Comparing Endovenous Laser Ablation, High Ligation and Stripping, and Ultrasound Guided Foam Sclerotherapy for Great Saphenous Varicose Veins. Eur J Vasc Endovasc Surg. 2026. (PMID: 41633433)
• Sayarer C, Arayici ME, Gencpinar T, Bayrak S. Effectiveness of endovenous ablation techniques and surgery for great saphenous vein incompetence: a comprehensive meta-analysis of randomized controlled trials. Sci Rep. 2026;16(1). (PMID: 41764322)
• Almeida J, Mackay E, Javier J, Mauriello J, Raines J. Saphenous laser ablation at 1470 nm targets the vein wall, not blood. Vasc Endovascular Surg. 2009;43(5):467-72. (PMID: 19628516)
• Morrison N, Gibson K, McEnroe S, et al. Randomized trial comparing cyanoacrylate embolization and radiofrequency ablation for incompetent great saphenous veins (VeClose). J Vasc Surg. 2015;61(4):985-94. (PMID: 25650040)
• Morrison N, Gibson K, Vasquez M, et al. Five-year extension study of patients from a randomized clinical trial (VeClose) comparing cyanoacrylate closure versus radiofrequency ablation for the treatment of incompetent great saphenous veins. J Vasc Surg Venous Lymphat Disord. 2020;8(6):978-989. (PMID: 32205125)
• Joh JH, Joo SH. Complex Hypersensitivity and Irritation Reaction (CHAIR) Phenomenon after Cyanoacrylate Closure of Varicose Vein. Vasc Specialist Int. 2023;39:27. (PMID: 37748929)
• Bootun R, Lane TR, Dharmarajah B, et al. Intra-procedural pain score in a randomised controlled trial comparing mechanochemical ablation to radiofrequency ablation: The Multicentre Venefit versus ClariVein for varicose veins trial. Phlebology. 2016;31(1):61-5. (PMID: 25193822)
• Rabe E, Partsch H, Hafner J, et al. Indications for medical compression stockings in venous and lymphatic disorders: An evidence-based consensus statement. Phlebology. 2018;33(3):163-184. (PMID: 28549402)
• Bakker NA, Schieven LW, Bruins RM, van den Berg M, Hissink RJ. Compression stockings after endovenous laser ablation of the great saphenous vein: a prospective randomized controlled trial. Eur J Vasc Endovasc Surg. 2013;46(5):588-92. (PMID: 24012465)
• Nemoto H, Mo M, Ito T, et al. Venous thromboembolism complications after endovenous laser ablation for varicose veins and role of duplex ultrasound scan. J Vasc Surg Venous Lymphat Disord. 2019;7(6):817-823. (PMID: 31540837)