Psoriasis - Phototherapy

Pulsed-Dye Lasers. Pulsed-dye lasers emit high-intensity yellow light, which destroy the tiny blood vessels that make up psoriatic plaques. (This treatment has been used for years to remove birthmarks, such as port wine stains, and unsightly blood vessels on the skin.) Some studies have reported significant (but not complete) improvement and remissions that have lasted up to 13 months. Treatments last up to 30 minutes and can feel uncomfortable (similar to being repeatedly snapped with a rubber band). It typically takes up to six sessions to clear the target areas. Bruising is common and there is a small risk for scarring.

Commercial Tanning Units

Home tanning devices and tanning salons are not ordinarily recommended, but they may be helpful for patients without access to a medical unit. In a 2003 study, many patients achieved a significant reduction in symptoms with a combination of acitretin and exposure to a UV-B commercial tanning unit (A Wolff tanning bed). However, UV outputs can vary widely among tanning beds and salons. Some units emit UVA radiation, which poses a higher risk for skin cancers. Adverse effects of tanning salons that use UVA or UVB radiation are the same as with any UV phototherapies, including a risk for skin cancer.