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What Is Endovenous Laser Therapy and How Does It Work?
Home / Articles
What Is Endovenous Laser Therapy and How Does It Work?
Imagine walking through a busy Seoul street in summer. The air is warm, people are in lighter clothing, and yet you notice something you’ve been hiding — bulging, twisted veins running down your legs. They ache after a long day, they feel heavy, and sometimes they even itch. For many people, these are more than cosmetic concerns; they’re signs of varicose veins, a condition linked to chronic venous insufficiency.
Let’s walk through what EVLT is, why it works, and how it might be the solution you’ve been searching for.
Your veins act like one-way highways, carrying blood back to the heart. In your legs, this job is especially demanding because blood has to fight against gravity. To help, veins are equipped with small valves that open and close to prevent backflow.
Swelling and heaviness in the legs
Night cramps or restlessness
Skin changes (darkening, thickening, even ulcers in severe cases)
Think of it like a garden hose that no longer closes properly — water leaks and stagnates. In the same way, malfunctioning veins let blood linger where it shouldn’t.
Here’s the beauty of it: once the diseased vein is closed, your body naturally reroutes blood into healthier veins. Over time, the closed vein shrinks and is reabsorbed by the body.
To put it simply: EVLT doesn’t remove the vein — it switches it off.
When patients come to Charm Vascular Clinic for EVLT, here’s what they can expect:
Instead of putting you to sleep, we use local anesthesia. Patients are awake but comfortable — many even chat during the procedure.
A small needle puncture (not a large incision) allows us to insert a thin laser fiber into the problematic vein, guided by ultrasound.
The laser delivers controlled bursts of heat along the vein’s inner wall. This heat causes the vein to collapse and seal shut.
Once closed, the blood automatically reroutes into nearby healthy veins. The circulation actually improves, not worsens.
The puncture site is covered with a simple bandage — no stitches required. Most patients walk out of the clinic the same day and return to work within 24–48 hours.
Over the years, vascular specialists like Dr. Insoo Park have seen how EVLT outperforms traditional surgery in several ways:
To be honest, what patients often don’t realize is that leaving varicose veins untreated can quietly worsen circulation over years. EVLT not only improves appearance but also prevents progression of chronic venous insufficiency.
Most patients describe the sensation as pressure rather than pain. The laser doesn’t burn the skin — it works deep inside the vein wall. Afterward, there may be mild tightness or bruising, which usually fades in a week or two.
EVLT is typically recommended for patients with:
Symptomatic varicose veins (pain, swelling, heaviness)
Chronic venous insufficiency diagnosed by ultrasound
Failed conservative treatments (like compression stockings)
However, not every patient is an automatic candidate. Some veins may be too small, too large, or too tortuous for EVLT. In those cases, other options like Radiofrequency Ablation (RFA) or VenaSeal™ may be better choices.
This is why consultation with a vascular specialist is essential — each leg’s vein map is as unique as a fingerprint.
Most patients notice lighter, more comfortable legs within weeks. Visually, bulging veins shrink over time, and the skin often looks healthier. To protect results, doctors usually recommend:
Wearing compression stockings for 1–2 weeks
Staying active (walking daily helps circulation)
Avoiding prolonged sitting or standing right after treatment
For many, the biggest change is not just physical but emotional. Patients regain confidence in wearing shorts or skirts, and more importantly, they stop worrying about long-term vein complications.
Highly accurate diagnosis with vascular ultrasound
Tailored treatment plans (EVLT, RFA, VenaSeal™, or combination therapies)
Long-term care to prevent recurrence
What people often overlook is that vascular conditions don’t just need treatment — they need follow-up. Veins can change over time, and ongoing care ensures lasting results.
Endovenous Laser Therapy isn’t just about closing a vein; it’s about restoring circulation, comfort, and quality of life. For anyone living with heavy, aching legs or visible varicose veins, it’s worth asking a vascular specialist whether EVLT is right for you.