Nd:YAG Laser
A laser that reaches deeper than most and is absorbed least by skin pigment. At 1064 nanometers it is the wavelength that makes hair removal and vessel treatment safer on deeper skin tones.
Key facts
Treats
Hair, vessels or pigment; settings differ
Recovery
Usually 0–2 days
Treatment plan
Hair removal: often 6–8 sessions
Typical cost
About $100–250 per small area
What is it?
It is a family of lasers.
Nd:YAG devices commonly deliver 1064-nm light.
Pulse modes differ.
Long-pulsed, Q-switched and picosecond modes have different effects.
It can suit darker skin.
Its wavelength is often used in darker skin types.
It still carries risk.
Inappropriate use can cause burns or pigment injury.
What it treats
Unwanted Hair
Safe hair removal on darker skin.
Spider Veins
Treats leg and facial veins.
Unwanted Tattoos
Q-switched versions clear dark ink.
Melasma
Heat can darken patches.
Ice Pick Scars
Other resurfacing works better.
Treatment areas
Nd:YAG Laser
Upper lip, legs and back; the target and pulse mode determine the treatment.
Nd:YAG Laser
Upper lip, legs and back; the target and pulse mode determine the treatment.
Skin tones
Lighter skin
Low risk
Works best with dark hair.
Medium skin
Low risk
A safe choice for most.
Deeper skin
Low risk
The safest laser wavelength for deeper skin; burns still possible with poor technique.
How it works
Diagram explanation
A target and pulse mode are selected: Long-pulse and short-pulse treatments have different uses. The chosen target absorbs energy: Pigment or blood can absorb 1064 nm laser energy. The tissue response depends on mode: Uses can include hair reduction, vessels, or selected tattoo pigment.
Schematic illustration. Technique and response vary. This explains a mechanism and does not specify treatment settings.
Types
The Nd:YAG laser comes in two main modes. Long pulses heat hair and vessels; very short pulses shatter ink and pigment.
Before your treatment
2–4 weeks before
4 weeks before: Sun and tanning: Avoid sun, sunbeds and self-tanner on the area.
4 weeks before: Hair removal: Do not wax, pluck, thread or use an epilator.
The week before
3 to 5 days before: Actives and shaving: Stop retinoids and exfoliating acids.
Day of treatment
Arrival & prep
Test spot: On a deeper skin tone, ask for a test spot.
Skin is examined, photographed and cleaned, and hair areas shaved again if needed.
Treatment
Everyone wears eye protection — 1064 nm light is invisible and can injure the eye without warning.
Cool gel or cold air goes on and the handpiece moves in overlapping passes. An upper lip takes a minute or two, a back or legs 30 to 60 minutes. Each pulse is a deep hot snap that lingers a second. Say if it is too much; settings and cooling can be adjusted.
Before you leave
Pink, warm, and often with a small raised bump around each treated follicle, like goosebumps or a mild rash.
After your treatment
First 24 hours
Days 1 to 3: Redness and swelling fade.
Weeks 2–4
Weeks 1 to 3: Treated hairs push out and fall away over one to three weeks.
Weeks 4 to 8: Fewer hairs return, finer and slower.
Time to results
1–4 weeks per session
How long results last
Long-term for hair; vessels can recur
Risks
Redness and small bumps around the follicles for a few hours are expected, not complications. The real risks come from too much energy, tanned or recently sun-exposed skin, and an operator who does not adjust settings for the skin in front of them.
Dark patches
New brown patches days to weeks later, more common on deeper skin tones and after sun. They usually fade over months, faster if treated early.
Light patches
Pale areas where pigment has been lost. Less common, slower to recover, sometimes lasting. This is the pigment problem worth taking seriously.
Blistering or crusting
Small blisters or scabs mean the surface got hotter than intended. Leave them alone and report them, because the settings need lowering next time.
Spots and folliculitis
Small pus bumps around follicles a few days later, most often on the back, chest and bikini line. Usually settles; sometimes needs a topical antibiotic.
More hair, not less
Occasionally hair thickens at the edge of a treated area, most often on the face and neck. It is uncommon, it has a name — paradoxical hypertrichosis — and it is worth reporting early rather than pushing on.
Cost
Typical cost
About $100–250 per small area
Pricing
In the US, small areas such as the upper lip, chin or underarms usually run about $100 to $250 a session.
Insurance
Insurance rarely covers any of this.
Alternatives
Alexandrite laser at 755 nm
Absorbed strongly by melanin, so it is fast and efficient on fair skin with dark hair, and carries a substantially higher burn and pigment risk on deeper skin tones. Faster and less painful than Nd:YAG where it is appropriate.
Diode laser at 800 to 810 nm
Sits between alexandrite and Nd:YAG in both efficiency and pigment risk. Newer diode devices with strong cooling are used on deeper skin tones by experienced providers, though 1064 nm remains the more conservative choice.
IPL
For hair reduction, strong for facial redness. Broad-spectrum light rather than a laser, so more of it is absorbed by surface pigment. Generally not used for hair on deeper skin tones, and results depend heavily on the operator.
Electrolysis
The only method that permanently destroys individual follicles. Works on any hair color, including blond, gray and white, which lasers cannot touch. Slow and treated hair by hair, so it suits small areas rather than legs or a back.
Pulsed dye laser at 595 nm
More precise on fine facial vessels and the diffuse flush of rosacea than Nd:YAG, and less suitable on deeper skin tones for the same reason it is more precise — pigment absorbs it more.
Sclerotherapy for leg veins
An injected solution rather than light, and often more effective than laser on larger leg veins. Bruising and brown staining along the vein are common afterward, and the two are sometimes combined.
Shaving, waxing and depilatory creams
Effective, cheap, and temporary. No risk of pigment change, but nothing lasting either, and waxing has to stop four weeks before any laser course.
Shaving
Cheap, works on every hair color, and the only hair removal allowed during a laser course, because it leaves the follicle intact. It does not make hair grow back thicker; the blunt cut end just feels coarser.
Waxing, threading and epilating
Lasts longer than shaving. Must stop at least four weeks before a laser course and stay stopped throughout, because pulling the hair out removes what the laser aims at.
Depilatory creams
Dissolve hair at the surface. Common cause of chemical irritation, especially on the face, so patch test first and do not use on skin treated in the last week.
Eflornithine cream
Applied to the face, it slows regrowth rather than removing hair, and it is sometimes used alongside a laser course. Growth returns when it is stopped.
Home IPL devices
These are lower powered and use broad-spectrum light, so they need repeated use for a modest effect. Most are labeled not for use on the deepest skin tones, and they do not work on light hair. Read the tone chart on the box before buying, not after.
Questions
Is Nd:YAG safe for deeper skin tones?
It is the wavelength usually chosen for them. At 1064 nanometers surface pigment absorbs very little of the light, so the pulse passes through rather than heating the skin. It still needs conservative settings, good cooling, a test spot and a provider who treats deeper skin tones regularly. Safer than the alternatives is not risk-free.
Is laser hair removal permanent?
It is permanent reduction. Hair comes back finer, sparser and slower, and most people need a top-up once or twice a year. Anyone promising permanent removal is overstating what these devices are cleared to claim.
Why does it hurt more than other lasers?
The target absorbs this wavelength weakly, so more energy has to be delivered, and deeper. That is the trade you accept for the pigment safety. Numbing cream, cold air and slower passes help, and settings can be adjusted if it is too much.
Why can I not wax between sessions?
The laser aims at pigment in the hair sitting in the follicle. Waxing, plucking and threading pull that hair out, so the next session has nothing to find. Shaving cuts at the surface and leaves the follicle full.
Will it work on my blond or gray hair?
No. Lasers find melanin and light hair does not have enough of it. This is not a settings problem and more sessions will not fix it. Electrolysis works regardless of hair color.
How many sessions before I see anything?
Treated hairs shed over one to three weeks after each session, which looks like regrowth and is not. Most people notice genuine thinning after three or four sessions, and the plan is usually six to eight before maintenance.
Related
Melasma
Electrolysis
IPL
Electrolysis vs Nd:YAG Laser
IPL vs Nd:YAG Laser
Laser Hair Removal vs Nd:YAG Laser
Nd:YAG Laser vs Picosecond Laser
Dermaplaning vs Nd:YAG Laser
Nd:YAG Laser vs Q-Switched Laser Tattoo Removal
Nd:YAG Laser vs Sclerotherapy
Nd:YAG Laser vs V-Beam
