YAG laser is a versatile medical laser used for selected hair-removal, pigmentation, vascular, tattoo, and skin-rejuvenation treatments. “YAG” can refer to different wavelengths and pulse formats, so the indication and settings must be selected by a trained medical professional after assessing the concern and skin tone.
What is a YAG laser?
YAG stands for yttrium aluminum garnet, the crystal used to generate laser energy. In aesthetic medicine, Nd:YAG systems commonly operate at 1064 nm and may also provide 532 nm through frequency doubling. Each wavelength interacts with pigment and blood vessels at a different depth.
How does YAG laser treatment work?
The laser delivers a controlled wavelength absorbed by a selected target, such as melanin in hair or tattoo ink, or hemoglobin in a blood vessel. The target converts light into heat or receives a rapid photoacoustic impact, depending on the pulse duration. Surrounding tissue is protected by choosing appropriate settings, spot size, pulse width, and cooling.
Types of YAG laser used in aesthetic clinics
Long-pulsed Nd:YAG
Long-pulsed 1064 nm Nd:YAG is often used for hair reduction and selected vascular concerns. Its deeper penetration and lower melanin absorption can make it an option for a broad range of skin tones when settings are selected carefully.
Q-switched Nd:YAG
Q-switched YAG delivers short pulses for selected pigmentation and tattoo colors. The 1064 nm wavelength is commonly used for dark tattoo pigment and deeper targets, while 532 nm may target selected superficial red or orange pigment.
What can YAG laser help treat?
- Unwanted facial or body hair
- Selected black or dark tattoo pigments
- Selected superficial pigmentation and uneven tone
- Small facial or leg vessels when medically appropriate
- Oiliness, enlarged-looking pores, and general skin rejuvenation using a suitable protocol
A diagnosis is important. Melasma, moles, vascular lesions, and tattoos require different treatment strategies and cannot safely use one standard setting.
Who may be suitable for YAG laser?
Suitability depends on the concern, skin tone, hair or pigment color, recent sun exposure, medication, and medical history. Treatment may need to be postponed for active infection, inflamed skin, recent tanning, photosensitivity, or pregnancy. Grey, white, or very light hair responds poorly to hair-removal lasers because it contains little melanin.
What happens during treatment?
- The doctor assesses the treatment area and confirms the indication.
- The skin is cleansed and protective eyewear is provided.
- Hair may be shaved or a topical anesthetic used, depending on the procedure.
- The laser is delivered with cooling and settings selected for the target.
- Aftercare and the recommended treatment interval are explained.
Does YAG laser hurt?
Patients may feel warmth, tingling, or a quick snapping sensation. Cooling can improve comfort. Stronger tattoo or vascular settings may feel more intense than gentle rejuvenation treatment. Pain tolerance and treatment area also affect sensation.
How many sessions are needed?
Hair grows in cycles, so hair reduction requires multiple sessions. Tattoo and pigmentation treatments also usually need a series because pigment clears gradually. The interval and total number depend on the target, treatment response, and healing—not a fixed package for every patient.
Possible side effects and risks
Temporary redness, swelling around hair follicles, warmth, or darkening of pigment may occur. Less common risks include burns, blistering, infection, post-inflammatory hyperpigmentation, hypopigmentation, and scarring. Incorrect settings or recent tanning increase risk.
Preparation and aftercare
- Avoid tanning and strong sun exposure before and after treatment.
- For hair removal, avoid waxing or plucking during the treatment course.
- Use gentle skincare and pause irritating actives as advised.
- Apply broad-spectrum sunscreen regularly.
- Do not scratch crusting or intentionally open blisters.
- Contact the clinic if symptoms become progressively worse.
YAG Laser in Bangkok at The Vanish Clinic
The Vanish Clinic assesses the treatment target and skin tone before recommending a YAG protocol or another laser platform. A consultation covers realistic outcomes, number of sessions, downtime, risks, and cost. Contact the clinic to receive an individualized treatment plan.
This content is for general education and does not replace an individual medical consultation.
