Hypopigmentation after laser treatment: what to know

Laser procedures target specific structures in the skin, but nearby pigment cells can also be disturbed. A pale patch may appear as treated skin heals, especially where the treatment was intense, repeated, or delivered to already sensitive skin. The appearance and timing are clues, not a diagnosis. A dermatologist will consider the laser type, settings, treatment area, healing pattern, prior tanning, and any symptoms. Scaling or a ring-like pattern can suggest a different issue such as Tinea Versicolor rather than a treatment-related colour change.

Follow the treating clinician’s aftercare instructions and pause further laser sessions until the area has been reviewed if the colour change is unexpected. Keep the skin moisturised as advised, avoid picking or friction, and protect it from sunlight with clothing and sunscreen. Do not apply steroid, bleaching, or pigment-lightening products without guidance. Photograph the area in consistent lighting and record when it appeared, whether it is enlarging, and any burning, crusting, or tenderness.

Contact the clinic for a review if the pale area keeps enlarging, remains inflamed, or develops scale, crust, pain, or sensitivity. Get prompt help for severe pain, blistering, pus, spreading redness, fever, or swelling near the eyes. A new patch outside the treatment field should be assessed rather than assumed to be a laser effect. Bring the procedure details and all products used during healing.

Was the laser intended to affect pigment, vessels, hair, or another target? Does the pattern match the treatment field? Should future sessions be delayed or adjusted? Would topical treatment or Excimer Laser Therapy be appropriate for this diagnosis? What signs would mean I need an urgent review?