UVB Phototherapy is an alternative treatment for psoriasis when natural sunlight isn’t as easy to access. This type of treatment involves exposing the skin to an artificial UVB light source in a medical setting or at home. There are two types of UVB treatment, broad-band and narrow-band. With the least amount of risk, narrow-band UVB treatments are considered the preferred method for moderate to severe psoriasis, but again, it’s important to discuss options with your physician. FYI: Most tanning beds are equipped with UVA bulbs that limit UVB exposure. While many with psoriasis turn to tanning beds for treatment, they’re only considered minimally effective, and the National Psoriasis Foundation does not support the use of tanning beds as a treatment option for psoriasis.