What to expect from excimer laser therapy for vitiligo

An excimer device delivers ultraviolet light to selected depigmented patches while limiting exposure to nearby skin. The light is intended to stimulate pigment-producing cells that remain in or around the treated area. A clinician adjusts the dose to your skin response, and treatment is usually repeated during planned visits. Early effects can include mild redness or warmth; pigment return, when it occurs, develops gradually and may be uneven. Response can differ between body sites, and hands, feet, lips, and areas with little remaining pigment may respond less readily.

Tell the clinic about medicines, active rashes, cold sores, or a history of unusual reactions to light before treatment. Arrive with clean skin unless your clinician gives different instructions, and follow the advised schedule closely because spacing affects assessment of the response. Do not apply unapproved tanning products or irritants to the area. After a session, use the recommended moisturiser and protect treated skin from avoidable sun exposure. Do not increase home ultraviolet exposure to speed results. Keep a record of redness, tenderness, blistering, or new pigment so the team can adjust the next session.

Contact your treatment team promptly if redness becomes intense, pain increases, blisters form, or the skin develops marked swelling or crusting. Seek urgent medical help for facial swelling with breathing difficulty or a widespread blistering reaction. A new changing patch, persistent soreness, or pigment loss outside the known vitiligo areas also deserves an examination rather than self-treatment.

Ask which patches are suitable, how the dose will be adjusted, what improvement would count as a useful response, and how long treatment will be reviewed before changing course. You can also ask about camouflage options, sun protection for contrasting skin, and what to do if redness lasts beyond the expected period.