Skin Health Psoriasis Treatment Excimer Laser Treatment for Psoriasis By Dean Goodless, MD Dean Goodless, MD Twitter Dean R. Goodless, MD, is a board-certified dermatologist specializing in psoriasis. Learn about our editorial process Updated on January 21, 2021 Medically reviewed Verywell Health articles are reviewed by board-certified physicians and healthcare professionals. Medical Reviewers confirm the content is thorough and accurate, reflecting the latest evidence-based research. Content is reviewed before publication and upon substantial updates. Learn more. by Leah Ansell, MD Medically reviewed by Leah Ansell, MD LinkedIn Leah Ansell, MD, is a board-certified dermatologist and an assistant professor of dermatology at Columbia University. Learn about our Medical Review Board Print Science Photo Library/Getty Images Could laser treatment for psoriasis be the answer to finding relief for those dry, itchy patches? If you have stubborn psoriasis, you've probably already tried medicated creams, oral medications, and light therapy. Here's what you should know about excimer laser treatment and how to seek it out. Getty Images / RUTH JENKINSON What Is Phototherapy? Phototherapy means treatment with light. For decades, phototherapy generally relied upon surrounding the patient with full-length fluorescent light bulbs in a specially designed cabinet. In this way, the entire body could be treated with therapeutic ultraviolet light. Although generally effective, it can be somewhat troublesome to use phototherapy to treat small areas of the body. For example, what if someone just wanted their hands or feet treated? In these instances, a special booth with openings for the hands or feet can be used, sparing the rest of the body unnecessary exposure to ultraviolet light. Treating Small Spots With Lasers What if you just have a few very stubborn plaques of psoriasis? Can you spot treat areas with ultraviolet light? That's where 308-nm excimer lasers come in. This type of laser is specially designed to produce ultraviolet radiation at a very specific wavelength of ultraviolet light—308 nanometers—that is highly effective in treating psoriasis. A nearly identical wavelength of light, 311 nanometers, referred to as narrow band-UVB (NB-UVB), is only available using special fluorescent light bulbs in the aforementioned cabinets or booths. Excimer lasers provide the benefits of NB-UVB but can be used on smaller treatment areas, such as the elbow or knee, for particularly stubborn plaques of psoriasis. Effectiveness Usually, two to three treatments with the excimer laser a week for about 10 to 15 weeks will achieve substantial improvement in a plaque of psoriasis. One major advantage of excimer laser treatment is that remission times are generally much longer than treatments relying on topical creams. Is Laser Treatment Right for You? Various brands of excimer laser equipment are now on the market. Medicare and most private insurance carriers will cover this treatment for suitable patients. The treatment is not suitable for all cases of psoriasis, so discuss the option with your dermatologist. Was this page helpful? Thanks for your feedback! Sign up for our Health Tip of the Day newsletter, and receive daily tips that will help you live your healthiest life. Sign Up You're in! Thank you, {{form.email}}, for signing up. There was an error. Please try again. What are your concerns? Other Inaccurate Hard to Understand Submit 0 Sources Verywell Health uses only high-quality sources, including peer-reviewed studies, to support the facts within our articles. Read our editorial process to learn more about how we fact-check and keep our content accurate, reliable, and trustworthy. Asawanonda, P., Anderson, R. R., Chang, Y., & Taylor, C. R. (2000). 308-nm Excimer Laser for the Treatment of Psoriasis. Arch Dermatol Archives of Dermatology, 136(5).