Potential Risks of Laser Treatment for Varicose Veins

Picture this: it’s the middle of summer in Seoul. You’ve spent years covering your legs, avoiding shorts or skirts because of those stubborn, bulging veins that feel heavier each season. One day, you hear about a treatment — Endovenous Laser Ablation (EVLA) — that promises to erase the veins without traditional surgery. It sounds almost too good to be true. But as with any medical procedure, a natural question follows: Is it safe? And what could go wrong?

At Charm Vascular Clinic here in Gwanak-gu, we get this question almost daily — especially from patients who’ve spent years living with discomfort, swelling, or simply the self-consciousness that varicose veins often bring. Let’s break it down honestly.

How Does Laser Treatment for Varicose Veins Work, Exactly?

Before diving into risks, it helps to understand what’s happening under the skin.

Endovenous Laser Ablation (EVLA) — sometimes simply called laser vein treatment — uses a thin laser fiber that’s inserted into the diseased vein through a tiny puncture. The laser’s heat seals the vein shut from the inside. Over time, the treated vein collapses, and your body naturally reroutes blood through healthier veins.

The beauty of EVLA is its minimal invasiveness: no large incisions, no hospital admission, and in most cases, you walk out the same day — quite literally.

The Good News: Laser Vein Treatment Is Very Safe When Done Properly

To be clear, EVLA is considered one of the safest and most effective modern treatments for varicose veins. Compared to traditional vein stripping — which required general anesthesia and larger incisions — laser ablation has far fewer complications and a much faster recovery.

Studies and real-world practice both back this up. At our clinic, Dr. Insoo Park has performed countless EVLA procedures with a high success rate and minimal adverse events. Most patients return to work or daily life within a day or two.

But — and there’s always a “but” in medicine — even safe procedures carry risks. It’s important to know what they are so you can make an informed decision.

So, What Are the Possible Risks?

Let’s be upfront about the main risks we explain to patients during consultations:

1. Mild Pain or Bruising

Some bruising and discomfort along the treated vein is normal. It’s similar to having a deep bruise. Most people describe it as mild soreness for a few days to a week. Compression stockings help reduce this significantly.

2. Skin Burns (Rare)

Because the laser generates heat inside the vein, there’s a very small chance of heat affecting nearby tissues or skin. When the procedure is done by an experienced vascular specialist using ultrasound guidance, the risk of skin burns drops dramatically — but it’s still something we monitor closely.

3. Nerve Injury (Uncommon)

Small sensory nerves run close to veins, especially in the calf or ankle. Occasionally, the heat from the laser can irritate or damage these nerves, causing numbness or tingling. In most cases, this is temporary and improves within weeks or months.

4. Blood Clot (Deep Vein Thrombosis — Very Rare)

One of the rare but serious risks is the formation of a blood clot in a deeper vein. The chance is very low — less than 1% in properly selected patients — but we take it seriously. That’s why vascular surgeons screen each patient’s vein anatomy carefully before treatment and give guidance on walking and wearing compression stockings afterward.

What People Often Overlook: The Risk of Doing Nothing

Here’s something most people don’t hear often enough: untreated varicose veins come with their own set of risks.

Leaving severe varicose veins alone can lead to chronic venous insufficiency, skin discoloration, painful swelling, or even ulcers that are difficult to heal. Some patients develop clots in surface veins (superficial thrombophlebitis), which, while usually less dangerous than DVT, can be painful and persistent.

So, while laser treatment carries small risks, ignoring progressive vein disease can be riskier over time.

How We Minimize Risks at Charm Vascular Clinic

To be honest, what matters just as much as the procedure itself is who is performing it.

At Charm Vascular Clinic, our approach is rooted in three core practices:

1. Detailed Pre-Treatment Screening:
   We use high-resolution ultrasound to map your veins thoroughly. This ensures we treat only the diseased veins and avoid damaging healthy ones or nearby nerves.

2. Ultrasound-Guided Precision:
   Every step of the procedure — from inserting the fiber to activating the laser — is guided by real-time ultrasound. This allows precise placement and reduces complications dramatically.

3. Personalized Aftercare:
   We see patients not just on the day of treatment but also during follow-ups to make sure healing is smooth. We adjust compression therapy and activity plans to your daily life — whether you’re a busy professional, a parent on your feet all day, or an older adult who needs extra care.

How Can You Reduce Risks Yourself?

Your role matters, too. Patients who follow post-treatment instructions — like wearing compression stockings, staying lightly active (walking helps prevent clots), and attending follow-ups — have the smoothest recoveries.

It’s tempting to skip these steps once the veins look better. But good aftercare is the final piece that ensures long-lasting results and minimal side effects.

Final Thoughts: Is Laser Vein Treatment Worth It?

In our experience, for the vast majority of patients, the benefits far outweigh the small risks. If you’re struggling with heaviness, pain, or the self-consciousness that comes with visible veins, a well-planned laser treatment can be life-changing.

If you’re considering it, take your time to choose a reputable vascular clinic — preferably one that specializes in minimally invasive vein care, like ours here at Charm Vascular Clinic. When done with precision and care, laser vein treatment is not only safe but a powerful tool to help you walk out lighter — in more ways than one.

If you’d like to learn whether laser treatment is right for you, or if you’re worried about possible risks, we welcome you to schedule a consultation with Dr. Insoo Park and our vascular team. Together, we’ll help you find the safest, most effective plan for your unique veins — and your peace of mind.