Gangnam
Dr. Yoon-Gon Ryu
Aesthetic Medicine Specialist
Flagship clinic · KOL for leading lifting & regenerative devices · Featured in Authority Magazine (2026)
Most legs need 2 to 3 long-pulsed Nd:YAG laser sessions spaced about 6 to 8 weeks apart, while denser or wider vein networks may need more.
Most reticular leg veins in Korea are treated with a long-pulsed 1064 nm Nd:YAG laser over 2 to 3 sessions spaced about 6 to 8 weeks apart, with denser networks sometimes needing more. Studies show roughly two-thirds of 1 to 3 mm veins clear over 75 percent after treatment. Vein size and density drive the count.
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For most people, reticular veins on the legs are cleared over a short course of 2 to 3 sessions using a long-pulsed 1064 nm Nd:YAG laser, spaced roughly 6 to 8 weeks apart. These bluish 1 to 3 mm veins sit deeper than surface spider veins, so the laser needs to deliver enough controlled energy over more than one visit to close them gradually. Clinical work shows about two-thirds of veins in this size range clear by more than 75 percent, with fuller results built across the course.
Denser networks, wider veins, or legs with many feeder vessels usually need more sessions, because each pass closes a share of the treated veins rather than all of them at once. Spacing matters: the 6 to 8 week gap lets treated veins fade and any bruising or matting settle before the next session, so the doctor can target only what remains. This is why a course is not delivered back to back, and why the visible improvement continues between sessions.
At Reberry Clinic, the session count is consultation-led rather than a fixed package, because vein size, depth, and density strongly affect how many passes are worthwhile and how conservatively the laser is set. International patients are supported in English across three Seoul-area locations (Gangnam, Myeongdong, Incheon Airport), so a course can be paced around return trips if needed.
The long-pulsed 1064 nm Nd:YAG laser works by targeting haemoglobin inside the vein, heating the vessel wall so it closes and is gradually reabsorbed by the body. At 1064 nm the light penetrates deeper than shorter wavelengths, which is why it suits reticular veins sitting 1 to 3 mm below the surface rather than fine surface capillaries. Because the vessel closes and clears over several weeks after each session, the benefit of one pass is not fully visible immediately, so a spaced course lets the doctor see the true result before treating again.
A single session rarely closes every vein in a network, and pushing energy too high in one go raises the risk of bruising, matting, or pigment changes, especially in darker tones. Treating over 2 to 3 sessions lets each round close a share of vessels safely while the leg recovers between visits. Reberry Clinic is a dermatology clinic where vascular laser is performed by the clinic’s doctors, who set conservative parameters and explain when related options on the laser treatment page suit your specific veins.
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The clinic’s doctors map your veins by size and depth to estimate whether 2, 3, or more sessions fit your legs.
A conservative first pass with the 1064 nm Nd:YAG laser closes a share of the 1 to 3 mm veins, setting a baseline response.
You wait about 6 to 8 weeks so treated veins fade and any bruising or matting settles before the next session.
After veins clear over several weeks, the doctor treats only the remaining vessels, refining energy for the next 1 or 2 sessions.
Most legs finish within 2 to 3 sessions, while dense or wide networks may run to 4 or more before maintenance.
See representative outcomes from Reberry Clinic. Results build gradually and vary by individual; your plan is assessed at consultation.
The clinic’s doctors map your leg veins in English and estimate whether 2, 3, or more Nd:YAG laser sessions fit your goals.
After skin cooling, the laser pass over the mapped veins usually takes about 15 to 30 minutes depending on the area.
Expect a snapping, warm sensation during treatment, with redness and possible bruising for several days afterward.
Treated veins fade over several weeks per session, with fuller clearance building across the planned 2 to 3 session course.
Following any compression and sun-care advice supports results; your doctor decides if further sessions are worthwhile after reviewing progress.
Most legs need 2 to 3 long-pulsed Nd:YAG laser sessions spaced about 6 to 8 weeks apart, with denser networks needing more. Studies show around two-thirds of 1 to 3 mm veins clear over 75 percent after treatment. The count depends on vein size and density. The clinic’s doctors confirm your plan; review options on our laser treatment page.
Each Nd:YAG pass closes a share of the treated veins, which then fade over several weeks, so one session rarely clears a whole network. Pushing energy too high in one go raises bruising and pigment risk. A spaced course lets each round close vessels safely while the leg recovers, which is why dense veins need 2 to 3 sessions rather than one.
Sessions are usually spaced about 6 to 8 weeks apart so treated veins fade and any bruising or matting settles before the next pass. This lets the doctor target only the veins that remain rather than retreat everything. Your doctor confirms timing based on how your legs respond, reviewing progress on our laser treatment page options.
Dense or widespread reticular networks commonly need 3 or more sessions, because each pass closes only a portion of the vessels and feeder veins keep supplying the area. Your doctor reassesses after each round and re-targets what remains. Larger feeder vessels may also be better suited to a combined approach, which your doctor discusses at consultation.
Usually no, because sessions need 6 to 8 weeks between them so veins fade and bruising settles, so a full course rarely fits one short visit. Many international patients have one session per trip or pace a plan across return visits. Our English-speaking team helps schedule sessions around your travel so each leg heals properly.
Yes, darker skin tones are treated with gentler, more conservative settings to limit post-inflammatory pigmentation, which can mean an extra session to reach the same clearance. This trade-off favours safety over an aggressive single pass. Your doctor matches energy and cooling to your tone, so the session count reflects safe parameters for your skin.
Yes, each Nd:YAG session typically causes redness and sometimes bruising over the treated veins for several days, occasionally with temporary matting or pigment changes. Most people manage normal activity quickly, but visible bruising can linger. Because this repeats with each session, plan social and travel timing around the recovery window when scheduling a multi-session course.
Treated veins fade gradually over several weeks after each session as the body reabsorbs the closed vessels, rather than disappearing on the day. This is why sessions are spaced and why dense networks improve across the course. Your doctor reviews which veins have cleared before deciding what to target in the next session.
Cleared reticular veins are generally gone for good because the treated vessels close and are reabsorbed, but this is not a one-time fix for the underlying tendency, so new veins can develop over years. Following compression and sun-care advice helps, and occasional maintenance rather than a full repeat course is often enough. Your doctor advises on long-term care.
Good candidates have visible 1 to 3 mm reticular leg veins, no untreated underlying venous disease, and realistic goals about a 2 to 3 session course. Suspected deeper vein problems are assessed first, and darker tones use gentler settings. Your doctor confirms suitability and may suggest supportive skin care options alongside the laser plan.
Yes, for mixed networks the doctor may combine laser with injection treatment, and trials report higher complete clearance across sessions with a combined approach. Larger feeder veins often respond better to injection, while finer reticular veins suit laser. Your doctor decides the mix per leg and may reference related injection treatment options at consultation.
Not always; clearance accumulates across a planned course but plateaus once the visible veins have closed, so extra sessions beyond what your legs need add downtime without proportional gain. Your doctor judges when results have peaked and recommends stopping or switching to maintenance. The goal is the right number of sessions, not the most.
Between sessions, follow any compression advice, avoid hot baths and intense sun on the legs, and use daily sunscreen, since sun exposure raises pigment risk while the skin settles. A gentle supportive routine such as our skin care options can help, and your doctor provides a written plan to follow before the next session.
Because bruising can be visible, staying about 3 to 5 days lets you have a consultation, one session, and time for early redness to settle before travelling. If your schedule is tight, your doctor can adjust intensity. Our English-speaking team helps plan each session around your trip dates.
International patients can complete a reticular vein course across one or more visits, and the clinic offers remote check-ins in English to review healing photos between sessions. Larger vessels may be planned alongside injection treatment on return trips. Your treatment notes are kept on file so each session continues the plan.
| Nd:YAG Laser | Sclerotherapy | Combined Laser + Sclerotherapy | |
|---|---|---|---|
| Energy / mechanism | Long-pulsed 1064 nm light heats and closes the vein | Sclerosant injected to collapse the vein from inside | Laser plus injection targeting the same vessel together |
| Typical sessions | Often 2 to 3, dense networks more | Often 2 to 3, spaced sessions | Often fewer sessions for complete clearance |
| Spacing | About 6 to 8 weeks apart | About 6 to 8 weeks apart | About 6 to 8 weeks apart |
| Best for | Needle-averse patients and finer reticular veins | Larger reticular veins and feeder vessels | Mixed networks of reticular veins and telangiectasias |
| Downtime per session | Redness and possible bruising for days | Bruising and compression for a period | Similar, with compression as advised |
| Results timeline | Veins fade over several weeks per session | Veins fade over several weeks | Faster combined clearance across sessions |
| Cost factors | Depends on area, vein count, and sessions | Depends on vein count and sessions | Depends on area and combined approach |
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