Light Therapy for Psoriasis: National Psoriasis Foundation
UVB is present in natural sunlight and is an effective treatment for psoriasis.. UVB penetrates the skin and slows the growth of affected skin cells.. Treatment using UVB can include UVB phototherapy, excimer laser, or in-office or home UVB phototherapy.. UVB phototherapy treatment involves exposing the skin to an artificial UVB light source for a ..