RFA vs foam vs avulsions: how to choose

The short version

If you have varicose veins, the “best” treatment is the one that matches the pattern of reflux on your duplex ultrasound scan and the veins you can see on the surface. Many people need a combination: one treatment to deal with the main faulty vein, and another to tidy up branches.

• RFA (radiofrequency ablation) is usually used to seal the main refluxing trunk vein.
• Foam sclerotherapy is often used for smaller varicose veins, branches, and residual veins after trunk treatment.
• Avulsions (phlebectomy) physically remove large, bulging surface veins through tiny cuts.

Why the duplex scan is the decision-maker

A duplex ultrasound scan maps blood flow in your leg veins and shows which veins are refluxing (letting blood fall backwards). This matters because treating the wrong vein can leave symptoms behind, even if the visible veins look improved.

What the scan helps answer

• Is there a refluxing trunk vein (such as the great saphenous vein or small saphenous vein) that should be treated first?
• Are the visible veins mainly branches off a faulty trunk, or are they smaller surface veins without major trunk reflux?
• Are there multiple sources of reflux (for example, more than one trunk vein) that could affect the result?

Option 1: Radiofrequency ablation (RFA)

RFA treats the underlying cause when a main trunk vein is refluxing. A thin catheter is placed into the vein under ultrasound guidance, local anaesthetic is used to numb the area, and controlled heat seals the vein closed. Blood is naturally redirected into healthier veins.

When RFA is often the best first step

• Your duplex scan shows reflux in a main trunk vein.
• You have symptoms such as aching, heaviness, swelling, throbbing or itching that match the reflux pattern.
• You want a durable treatment for the underlying reflux, not just cosmetic improvement.

What to expect afterwards

1. 1
   You can walk immediately after the procedure, and most people return to normal activities quickly

2. 2
   The treated line can feel tight or bruised for days to a couple of weeks

3. 3
   A follow-up scan confirms the vein has sealed and checks for any issues that need attention

Option 2: Foam sclerotherapy

Foam sclerotherapy uses a medicine mixed into a foam that irritates the inside of the vein so it closes and fades over time. It is particularly useful for smaller varicose veins and branches, and it can also be used as a second step after RFA.

When foam is a good fit

• Your main trunk vein is not significantly refluxing, but you have smaller varicose veins or clusters.
• You have residual veins after trunk treatment that need “tidying up”.
• You want a minimally invasive option with no incisions.

What to expect afterwards

1. 1
   The treated veins often look worse before they look better (lumpy, bruised, or darker) as they harden and then gradually fade

2. 2
   You may need more than one session, especially for larger networks of veins

3. 3
   A follow-up scan may be recommended if there is any concern about deeper reflux or if symptoms persist

Option 3: Avulsions (phlebectomy)

Avulsions remove bulging surface veins through tiny cuts. The veins are teased out with a small hook and removed, leaving the deeper circulation intact. This is often done under local anaesthetic as a walk-in, walk-out procedure.

When avulsions are most helpful

• You have large, ropey veins that are unlikely to disappear with foam alone.
• You want an immediate reduction in the bulge of surface veins.
• Your scan suggests the trunk reflux has been treated (or is being treated) and the remaining issue is surface branches.

What to expect afterwards

1. 1
   Bruising is common and can look dramatic for 1–2 weeks

2. 2
   Tiny marks usually settle well; most people find they are hard to spot once healed

3. 3
   You may feel small lumps or firmness as bruising resolves

How these treatments are often combined

It is very common to treat varicose veins in stages, because different veins respond best to different approaches.

1. 1
   Treat the refluxing trunk vein (often with RFA) to address the underlying cause

2. 2
   Treat remaining branches (with foam and/or avulsions) to improve comfort and appearance

3. 3
   Review progress at follow-up and decide if any small “top-up” treatment is worthwhile

Questions to ask yourself before choosing

• Is my main goal symptom relief, cosmetic improvement, or both?
• Do I want the most definitive treatment for reflux, even if it means a catheter-based procedure?
• Am I comfortable with small cuts and bruising if it gives a faster cosmetic change?
• Do I understand that more than one treatment can be normal, not a sign of failure?

Next steps

If you are deciding between RFA, foam sclerotherapy and avulsions, the most helpful first step is a specialist assessment. That way you can understand what is driving your veins and what outcome is realistic for your leg.