What is a Q-Switch Laser Treatment?
The Q-Switch Nd:YAG laser is a precise way to target unwanted pigmentation. This advanced system uses two specific light wavelengths: 1064nm and 532nm. These allow us to treat pigmentation at different skin depths. The 1064nm wavelength reaches deeper to address darker pigments. The 532nm wavelength targets lighter, surface-level pigmentation like freckles and some age spots.
A key feature is “Q-switching,” which delivers very high energy in extremely short bursts (nanoseconds). This rapid energy breaks down pigment particles into tiny pieces that your body naturally removes. This focused action reduces heat damage to surrounding skin, making the Q-Switch laser an effective treatment with fewer side effects.

What Does Q-Switch Laser Treat?
The Q-Switch Nd:YAG laser treatment is primarily known for addressing various pigment-related skin issues, but it is also effective in improving acne scars. It can help with:
- Acne Scars: Q-Switch laser treatment helps improve the appearance of post-inflammatory hyperpigmentation (PIH), which are the dark marks and scars left behind after acne has healed.
- Tattoo Removal: Breaks down tattoo ink for gradual fading and removal.
- Freckles (Ephelides): Small, flat, tan or light brown spots that typically appear on sun-exposed skin and are more common in individuals with lighter skin tones. Q-Switch lasers can help to lighten and reduce freckles.
- Melasma: Characterised by larger patches of darkened skin, often appearing on the face (cheeks, forehead, upper lip). It is frequently triggered by hormonal changes, such as during pregnancy or with the use of oral contraceptives. Q-Switch lasers can help lessen and lighten melasma.
- Other Pigment Concerns: Q-Switch lasers can also help with reducing dark eye circles and other pigmentation concerns such as birthmarks or PIH from eczema or minor injuries.
- Sun spots (Solar Lentigines): Sun spots are flat, darkened spots that appear on areas frequently exposed to the sun, such as the face, hands, and décolletage. Q-Switch lasers can lessen pigmentation in targeted areas to help lighten sun spots.
- Age spots (Senile Lentigines): Age spots are similar to sunspots as they are also a result of cumulative sun exposure, but tend to appear later in life. Like with sun spots, Q-Switch lasers can be effective in lightening age spot pigmentation.
If you have specific pigment or acne-related concerns not mentioned here, consult Dr Gerard Ee about skin pigmentation treatment or acne scar removal in Singapore.
Recommended Skin Type for Q-Switch Laser Treatment
Pale Skin
Fair Skin
Medium Skin
Olive Skin
Brown Skin
Dark Skin

How Does Q-Switch Laser Treatment Work?
The Q-Switch Nd:YAG laser treatment targets unwanted pigmentation with non-invasive precision.
- High-Intensity Pulses of Light: The laser emits rapid pulses of light at two specific wavelengths which are strongly absorbed by melanin, the pigment in your skin. The different wavelengths allow us to target pigmentation at various depths.
- Pigmentation, Dark Spots or Tattoo Ink are Targeted: The laser energy is selectively absorbed by the melanin in target areas. This means the laser focuses its energy on areas with higher concentrations of pigment, while leaving the surrounding skin relatively untouched. This ensures the rest of your skin is not affected by the non-invasive laser treatment process.
- Pigmentation is Broken Down: When the melanin cells absorb this intense light energy, they heat up very quickly. This creates tiny shockwaves inside the pigment particles which act like microscopic hammers, breaking down larger pigment clumps into much smaller fragments.
- Broken Down Pigment is Naturally Eliminated by Your Body: These smaller pigment fragments are now easier for your body to eliminate. Your immune system recognises these tiny pieces as waste. Specialised cells, called macrophages, then work to engulf and remove the fragmented pigment. Over time, this natural process leads to a visible lightening and reduction of the pigmentation, revealing a more even skin tone.
What Should I Expect During a Q-Switch Laser Treatment Session?
When you choose to have Q-Switch laser treatment at Dr Ee’s clinic, you can expect a quick and comfortable experience focused on achieving your pigmentation treatment goals.
- Consultation and Skin Assessment: Dr Ee will first conduct a thorough consultation to assess your skin, confirm the type of pigmentation, and discuss your concerns and desired outcomes.
- Skin Preparation: No complex pre-treatment preparation is required. You will simply be asked to ensure all makeup, sunblock, and topical products are completely removed from the treatment area. For this type of pigmentation treatment, a local anesthetic or numbing cream is generally not required. However, if you are sensitive to pain or irritation do bring it up to our staff.
- Procedure: The Q-Switch treatment itself is relatively quick. Large areas of brown spots or pigmentation are typically treated in less than 20 minutes. In many cases, lentigines and freckles can be significantly lightened or removed in a single session.
- Sensation: The firing of the laser often feels like the flicking of a tiny elastic band against the skin. It may feel uncomfortable but should not be extremely painful.
- Immediate Post-Procedure: Immediately afterwards, your skin may feel slightly sensitive and mild redness may occur over the treated sites. This should only last for a few hours.
- Results: For pigmentation, lightening is typically best seen within 1–2 weeks as the body clears the fragmented pigment. For vascular issues, results can sometimes be seen within 24 hours
Benefits of Q-Switch Laser Treatment
Our Q-Switch laser treatment offers numerous benefits including:
- Pigmentation Reduction: Reduces the appearance of melasma, sunspots, and other forms of pigmentation. Over the course of multiple treatments, unwanted pigment is suppressed and lightened — resulting in a more even and brighter skin tone.
- Acne Management: Helps regulate excess oil production, a key factor in acne development. Additionally, the laser energy can speed up the healing of active acne lesions.
- Improves Skin Clarity: Promotes a brighter and more even skin tone through the subtle heating of dermal layers through laser, which stimulates collagen regeneration whilst refining skin texture. This can also help reduce pore size, improve fine lines, fade marks left by acne, and reduce redness, leaving the skin rejuvenated.
- Non-Invasive & Minimal Downtime: This treatment is non-invasive, meaning there are no cuts or incisions involved. It also involves minimal downtime, allowing you to resume your daily activities quickly. Q-Switch laser can also be used anywhere on the face — including to decrease eye puffiness and dark circles — as well as to firm and treat the neck.

Trusted Care by Dr Gerard Ee
MBBS (UK), MRCS (Edinburgh), DP Dermatology (Cardiff)
Dr Gerard Ee is a medical aesthetic doctor specialising in acne laser treatments in Singapore. He earned his medical degree (MBBS) from St George’s University of London before pursuing further training and becoming a member of the Royal College of Surgeons (MRCS) in Edinburgh. He has also attained DP Dermatology from Cardiff University and worked in Singapore General Hospital (SGH), National University Hospital (NUH), and Mount Sinai Hospital in New York.
Dr Ee has accreditations in applications of Botox, fillers, lasers, and light therapy for medical aesthetic purposes. His areas of expertise include Acne and Acne Scar Treatment, Medical Aesthetics, and Skin Rejuvenation. He believes in a patient-centered approach based on trust and open communication, creating personalised and evidence-based treatment plans tailored to their specific needs. He is committed to providing a comfortable and supportive environment where patients of all ages, genders, and backgrounds feel empowered to make informed decisions about their skin health and appearance.
Frequently Asked Questions About Q-Switch Nd:YAG Laser
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