An excimer laser is used to treat localized psoriasis and localized vitiligo. It delivers targeted narrow-band UVB to affected areas. For further details about narrowband UVB, please see our guide to Narrowband UVB phototherapy. Treatments are quick and painless and usually result in rapid improvement of disease.
This laser is now primarily being used to treat psoriasis on the scalp. It requires 10 to 30 treatments and often gives long remissions. Likewise, it can be used to treat localized vitiligo in a similar fashion.