How effective is excimer laser therapy for hypopigmentation?

Hypopigmentation means an area has less pigment than the surrounding skin. It can follow inflammation, injury, infection, medication, or another skin condition, so identifying the cause comes first. Excimer laser delivers a focused ultraviolet light treatment to selected patches and may stimulate pigment-producing cells in suitable cases. It is not appropriate for every light patch, and the colour may remain uneven or fade again if the underlying condition stays active. The contrast can also look stronger after surrounding skin tans.

Have the patch examined before treatment, particularly if it is new, spreading, scaly, itchy, or sharply white. A dermatologist will consider its cause, location, skin type, and nearby pigment before choosing settings and a treatment schedule. Protect treated and untreated skin from unnecessary ultraviolet exposure and follow instructions about creams between sessions. Take progress photos in similar lighting rather than comparing the area immediately after a session, when temporary redness may affect its appearance.

Tell the treating clinician about marked redness, blistering, crusting, pain, or a burn-like reaction after treatment. Seek an assessment if the patch changes rapidly, develops a new border, bleeds, or is associated with other symptoms. New areas of pigment loss should be diagnosed before laser treatment, because a different condition may need a different approach.

Ask what is causing the hypopigmentation, whether excimer laser suits that diagnosis, and what improvement would count as a useful response. Discuss expected redness, protection from ultraviolet light, alternatives, maintenance, and when the treatment plan should be reconsidered.