NZ-specific risk guide

Risks of varicose vein treatment in New Zealand

Covers sclerotherapy, endovenous laser ablation, radiofrequency ablation and surgical stripping for varicose veins.

Last reviewed: 2026-05-27 · how we source risk data

Who is qualified to perform this in NZ

In NZ, treated by vascular surgeons (FRACS), interventional radiologists or doctors with phlebology training. Verify MCNZ registration.

Risks

Risks are categorised by frequency reported in NZ + Australasian surgical college guidance. None of this is a substitute for an individual clinical assessment by a registered practitioner.

Bruising and discomfort

Common

What: Expected. Resolves over 1-2 weeks.

How risk is reduced: Compression stockings post-treatment.

Pigmentation along treated vein

Common

What: Brown line along the treated vein; usually fades over months.

How risk is reduced: Sun protection on treated area.

Recurrence

Uncommon

What: New veins may develop or treated veins recanalise. Lifetime recurrence is well-documented.

How risk is reduced: Realistic expectations; ongoing leg health (exercise, weight management, compression where indicated).

Deep vein thrombosis (DVT)

Rare

What: Documented but uncommon complication.

How risk is reduced: Compression stockings, early walking post-procedure.

Nerve injury

Rare

What: Temporary or rarely permanent numbness near treated vein.

How risk is reduced: Experienced operator; thermal-protection technique.

Skin burns (thermal ablation)

Rare

What: Risk with laser/RF ablation if technique imperfect.

How risk is reduced: Practitioner uses tumescent anaesthesia and modern equipment.

Pre-procedure checklist

  1. Confirm the practitioner is MCNZ-registered.
  2. For surgical procedures, look for FRACS vascular surgery.
  3. Get duplex ultrasound assessment pre-procedure.
  4. Discuss recurrence risk — varicose veins can return.
  5. Get a written quote (some treatments are partially DHB-funded for symptoms; cosmetic-only is private).

Red flags — stop and get a second opinion if you see these

  • Treatment offered without prior duplex ultrasound.
  • "Permanent cure" claims — varicose veins can recur even after successful treatment.

Call your clinic if you notice

  • · Increasing leg pain or swelling
  • · Calf tenderness
  • · Skin necrosis at treatment site
  • · Wound infection

When to call 111 / go to ED

Sudden calf swelling, shortness of breath, chest pain — call 111 (possible DVT/PE).

Sources we reference

This page draws on NZ + Australasian surgical college guidance and NZ regulator publications. Full list:

See all sources we cite across the site.

Next steps

Browse varicose vein treatment clinics →

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 Browse common questions →

Plain-language answers to 200+ NZ medical questions.

This page is general guidance about the kinds of risks documented for varicose vein treatment in New Zealand and Australia. It is not a substitute for an in-person clinical assessment. Risk profiles depend on the specific procedure, your individual health, the surgeon\'s experience and the facility. Always discuss your specific situation with a registered practitioner before consenting to any procedure.

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