Endovenous Laser Treatment (EVLT) for Varicose Veins

Endovenous laser treatment (EVLT) is a procedure that uses laser heat to treat varicose veins. 

Varicose veins are swollen and enlarged veins. They occur most often in the legs. Varicose veins can develop when valves in your veins become damaged. This causes problems with blood flow. Over time, too much blood collects in the veins. The veins may bulge, twist, and stand out under your skin. They can also cause symptoms such as aching, cramping, or swelling in your legs.

During EVLT, heat created from a laser is sent into the vein through a thin, flexible tube (catheter). This closes off blood flow in the main problem vein.

Getting ready for your treatment

Follow any instructions from your healthcare provider.

Tell your healthcare provider if you:

  • Are pregnant or think you could be

  • Are breastfeeding

  • Smoke or use alcohol on a regular basis

  • Have other health problems, such as diabetes or kidney problems

Tell your provider about any medicines you are taking. You may need to stop taking all or some of these before the procedure. This includes:

  • Medicines that can thin your blood or prevent clotting (anticoagulants)

  • All prescription medicines

  • Over-the-counter medicines such as aspirin or ibuprofen

  • Illegal drugs

  • Herbs, vitamins, and other supplements

Follow any directions you’re given for not eating or drinking before the treatment.

The day of your treatment

The treatment takes 45 to 60 minutes. The entire treatment (including time to prepare and recover) takes about 1 to 3 hours. You can go home the same day. For the treatment:

  • You’ll lie down on a hospital bed.

  • An imaging method, such as ultrasound, is used to guide the procedure.

  • The leg to be treated is injected with numbing medicine.

  • Once your leg is numb, a needle makes a small hole (puncture) in the vein to be treated.

  • The catheter containing the laser heat source is inserted into your vein.

  • More numbing medicine may be injected around the vein.

  • Once the catheter is in the right position, it's then slowly drawn backward. As the catheter sends out heat, the vein is closed off.

  • In some cases, other side branch varicose veins may be removed or tied off through several small cuts (incisions).

  • When the treatment is done, the catheter is removed. Pressure is applied to the insertion site to stop any bleeding. An elastic compression stocking or a bandage may then be put on your leg.

Recovering at home

Once at home, follow all the instructions you’ve been given. Be sure to:

  • Take all medicines as directed

  • Care for the catheter insertion site as directed

  • Check for signs of infection at the catheter insertion site (see below)

  • Wear elastic stockings or bandages as directed

  • Keep your legs raised (elevated) as directed

  • Walk a few times a day

  • Don't do heavy exercise, lift, or stand for long periods as advised

  • Don't travel by air as advised

  • Don't sit in hot baths, saunas, or whirlpools as advised

Call your healthcare provider

Call your healthcare provider if you have any of the following:

  • Fever of 100.4° F ( 38° C) or higher, or as directed by your provider

  • Chest pain or trouble breathing

  • Signs of infection at the catheter insertion site. These include greater redness or swelling (inflammation), warmth, increasing pain, bleeding, or bad-smelling discharge.

  • Severe numbness or tingling in the treated leg

  • Severe pain or swelling in the treated leg


You’ll have a follow-up visit with your healthcare provider within a week. An ultrasound will likely be done to check for problems such as blood clots. Your provider will discuss more treatments with you, if needed. 

Risk and possible complications

These include:

  • Bleeding

  • Infection

  • Blood clots

  • Damage to the nerves in the treated area

  • Irritation or burning of the skin over the treated vein

  • Treatment doesn't improve the look or the symptoms of the problem veins

  • Risks of any medicines used during the treatment

© 2000-2024 The StayWell Company, LLC. All rights reserved. This information is not intended as a substitute for professional medical care. Always follow your healthcare professional's instructions.
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