When is narrowband UVB phototherapy recommended for vitiligo?

The skin is exposed to a carefully selected band of ultraviolet B light during scheduled clinic sessions. Treatment aims to stimulate pigment-producing cells around or within affected areas. Response can vary by body region; the face and trunk may respond differently from hands and feet. The clinician also considers whether new patches are appearing, whether the condition is stable, and whether the treatment area can be reached safely.

Arrange a dermatology assessment before using a home light device. Bring a list of medicines and mention previous light sensitivity, skin cancers, or conditions that worsen with ultraviolet exposure. Follow the prescribed session schedule and protect untreated skin as instructed. Do not increase exposure on your own if redness develops; tell the treatment team so the plan can be adjusted.

Contact the clinic promptly for marked redness, blistering, severe tenderness, eye discomfort, or a new reaction after a session. Seek assessment for rapidly spreading pigment loss, inflammation, or uncertainty about whether a pale patch is vitiligo, since other skin conditions can look similar.

Ask which areas are suitable for narrowband UVB, what improvement would be realistic for your skin sites, how your medicines affect light sensitivity, and how progress will be monitored.