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Laser therapy is a kind of light-based treatment (phototherapy) that can target specific psoriasis lesions without affecting the surrounding skin. This is particularly useful for psoriasis on the hands and feet, or other localized areas.

Lasers use an intense light source that penetrates deeply into the skin. This means each treatment is more effective and fewer treatments are required than for UVB or PUVA.

There are two main types of lasers used for psoriasis: 

• Excimer laser (XTRAC)—During this treatment, a targeted beam of ultraviolet B (UVB) light is focused on the lesion, triggering a slowdown in skin cell growth and inflammation. Most patients see symptom clearance after 4–10 twice-weekly sessions, each session lasting a few minutes. Sessions are generally painless. Common side effects include blistering and hyperpigmentation (darkening of the skin).
• Pulsed dye laser—Pulsed dye lasers destroy the tiny blood vessels in the deep layers of the psoriasis lesions. This appears to reduce the rate of skin cell growth in the area. Patients can expect symptom clearance after 4-6 treatments, which last 15-30 minutes. Frequency of treatments will depend on the amount of body surface affected and location of lesions. While this treatment offers relatively quick results (some clearing as early as two weeks), it can be uncomfortable and even painful. Possible side effects include redness and blistering, skin discoloration, and scarring.

Laser treatment may be combined with other treatments.

Where can I learn more about laser treatment for psoriasis?

• Lasers for psoriasis treatment (American Academy of Dermatology)

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©2010 Vivacare. Last updated July 26, 2010.

This information is for general educational uses only. It may not apply to you and your specific medical needs. This information should not be used in place of a visit, call, consultation with or the advice of your physician or health care professional. Communicate promptly with your physician or other health care professional with any health-related questions or concerns.

Be sure to follow specific instructions given to you by your physician or health care professional.