The excimer laser is a promising treatment recently approved by the Food and Drug Administration (FDA) for treating chronic, localized psoriasis plaques. This laser emits high-intensity UVB and is recommended at two treatments per week. Unfortunately, there currently isn’t enough data to indicate how long the improvement will last. Pulsed dye lasers are another option. They destroy the tiny blood vessels that contribute to the formation of psoriasis lesions. The treatment is recommended at 15-30 minute sessions every three weeks and can result in some bruising or scarring. On the plus side, this method has a proven track record of success. Consult with your physician about the pros and cons.