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Also known as: Varicose vein therapy

Duration: About 15 to 30 minutes

Sclerotherapy is a procedure that is performed in a clinic setting to treat varicose veins and chronic venous insufficiency in the lower extremities/limbs. The targeted vein is treated with a sclerosing substance to seal off the diseased vein and reroute the blood flow to other healthy ones.


  • In varicose veins and chronic venous insufficiency

Preparing for the procedure: 

Download Pre & Post Procedure Instructions

How it is performed: 

  • First, an ultrasound is performed to check for any clots in the leg veins.
  • Once the vein to be treated is targeted, a local anesthetic will be given so you can relax while you remain awake during the procedure.
  • With ultrasound guidance, a sclerosing substance is injected into the targeted vein in your leg.
  • The substance scars the lining of the vein and seals it off.
  • The blood flow is redirected to other healthy veins.
  • A compression stocking is given to wear at the end.

Worthington-Kirsch RL. Injection sclerotherapy. Semin Intervent Radiol. 2005;22(3):209-217. doi:10.1055/s-2005-921954
de Oliveira RG, de Morais Filho D, Engelhorn CA, Kessler IM, Coelho Neto F. Foam sclerotherapy for lower-limb varicose veins: impact on saphenous vein diameter. Radiol Bras. 2018;51(6):372-376. doi:10.1590/0100-3984.2017.0184
Karmacharya RM, Shrestha B, Singh A, Chandi N, Bhandari N. Short Term Outcome of Adjunct Foam Sclerotherapy for Varicose Veins in Patients Subjected to RFA at Dhulikhel Hospital, Nepal. Int J Vasc Med. 2019;2019:4956437. Published 2019 Oct 7. doi:10.1155/2019/4956437