UVA UVB Narrow Band UVB

Present in natural sunlight, UVB is an effective treatment for psoriasis. UVB penetrates the skin and slows the growth of affected skin cells.

Like UVB, ultraviolet light A (UVA) is present in sunlight. It can also be used to treat psoriasis.

Narrow band UVB is a specific band of the UVB spectrum that is also effective at treating psoriasis.