Laser Treatment for Psoriasis

If you're living with psoriasis, you know how uncomfortable and embarrassing the red, itchy, scaly skin can be. Treatment options for psoriasis include steroid cream or other medicated creams, oral medications, and light therapy.

All of these treatments work well, but medications can have side effects and light therapy requires a regimen of three sessions a week for two to three months.

Today, there is another option for treating psoriasis: excimer lasers, which deliver ultraviolet light to localized areas of the skin. This treatment uses intense, focused doses of laser light to help control areas of mild to moderate psoriasis without harming healthy skin around them. Targeted laser therapy is similar in effectiveness to traditional light therapy, but it works in fewer sessions with stronger doses of light that can reach deeper into the affected skin. The handheld laser wands are also good for reaching psoriasis in hard-to-treat areas, such as the elbows, knees, palms of the hands, soles of the feet, and scalp.

How do laser treatments for psoriasis work? Can they really clear up your skin? Here's what the research shows about this new treatment for psoriasis.

Psoriasis Laser Treatment: How It Works

Excimer laser treatments are performed in the dermatologist's office. Each session takes only a few minutes. During the treatment, the doctor aims the laser directly at patches of psoriasis. You might feel some warmth at the site or a snapping sensation against the skin.

Laser treatments for psoriasis use one of two types of lasers: a pulsed dye laser (PDL) or an excimer laser.

Pulsed dye lasers create a concentrated beam of yellow light. When the light hits the skin, it converts to heat. The heat destroys the extra blood vessels in the skin that contribute to psoriasis, without harming nearby skin.

Excimer lasers aim a high intensity ultraviolet B (UVB) light dose of a very specific wavelength -- 308 nanometers -- directly at the psoriasis plaques. Because the laser light never touches the surrounding skin, it reduces the risk of UV radiation exposure. Excimer lasers are used to treat mild-to-moderate psoriasis.

With excimer laser therapy, patients usually have two treatments lasting 15-30 minutes each week for three or more weeks, with at least a 48-hour break between treatments. With pulsed dye laser therapy, sessions go for 15-30 minutes every three weeks.

Your doctor will determine your dose of laser light based on the thickness of your psoriasis plaques and your skin color (a lower dose is used on lighter skin). During the procedure, you will be given dark goggles to protect your eyes.

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