Phototherapy treatments are usually performed at a doctor8217s office or a psoriasis center. With the patient undressed to expose the affected areas and spare unaffected areas from the side effects of UV light, special goggles are used to prevent the risk of UV-induced cataracts. Additionally, genitalia are protected to minimize the risk of skin cancer, which is more problematic in that area. The patient stands in front of a light box lined with vertically oriented fluorescent UV lamps. Psoriasis can often be effectively treated with a good skincare routine and medication applied to the affected areas of skin. But this doesnx02019t always help enough in moderate and severe psoriasis. UV light therapy is then considered. This treatment, also known as phototherapy, can be used on its own or in combination with topical (externally applied) medication or tablets. It involves exposing the affected areas of skin to ultraviolet light (UV light). UV light reduces inflammation and slows the production of skin cells.