Does excimer laser therapy treat hypopigmentation?

Hypopigmentation means an area of skin has less colour than the surrounding skin. It can follow inflammation, injury, infection or certain pigment disorders, and each cause behaves differently. Excimer treatment delivers a concentrated beam of ultraviolet light to selected areas with the aim of stimulating pigment activity. A light patch must be examined first because treating an active rash, scar or infection with light may be inappropriate. The colour of the patch, its borders, symptoms and history help guide the decision.

Arrange a dermatology assessment and mention when the patch began, whether it is changing, and any preceding rash, wound or medicine. Bring a list of products used on the area and describe how your skin reacts to sunlight. If excimer therapy is considered, the clinician will discuss the target area, eye protection, possible redness or temporary irritation, and how progress will be reviewed. Protecting the patch from excess ultraviolet exposure can reduce contrast while the cause is being clarified.

Seek an assessment if pale areas expand quickly, develop scale, pain, blisters, bleeding or marked itch, or appear after a new medicine. Prompt advice is particularly useful when pigment loss affects the face, hands or a large visible area, because the diagnosis and treatment plan may differ. New eye symptoms or extensive light sensitivity after any light procedure need urgent medical guidance.

What is causing my hypopigmentation? Is excimer therapy appropriate for this cause and location? What skin reaction should I expect? How will you protect nearby skin and assess whether treatment is helping?