What should you know about q switch laser for skin whitening?

Q-switched devices send very short bursts of light into selected pigment. The energy can fragment pigment in the treated area, after which the body clears the particles over time. A clinician first needs to identify whether the concern is a sun spot, post-inflammatory pigmentation, melasma or another condition, because these respond differently and some can become more noticeable after irritation or heat.

Temporary redness, sensitivity, swelling or darkening of spots can occur. A lighter patch or darker patch is also possible, particularly when the skin is inflamed or exposed to sunlight during recovery. A consultation should include your skin tone, tanning history, previous reactions and current products.

Avoid booking while the area is sunburned or recently tanned. Tell the clinician about pregnancy, medicines, active skin disease, recent peels and a tendency to develop dark marks after spots or wounds. Do not use unlabelled bleaching creams or steroid-containing products to prepare the skin.

After a session, cleanse gently, moisturise and protect exposed skin from sunlight with broad-spectrum sunscreen and physical cover. Avoid picking, scrubbing, waxing or applying irritating actives until the skin has recovered. If the original pigmentation returns, it needs reassessment rather than repeated treatment without a clear plan.

Ask for review if you develop blistering, open skin, marked pain, spreading redness, pus, fever, or a patch that becomes distinctly lighter or darker and does not settle. Any changing, bleeding or uncertain pigmented lesion should be examined before cosmetic laser treatment.

What is the likely cause of my uneven tone? Is laser suitable for my skin and pigment pattern? How will you reduce the risk of post-treatment colour change? Which products should I stop, and what is the follow-up plan if the pigment returns?