An angelicin is a tricyclic heterocycle which is an isomer of psoralen.

UVA in combination with psoralen is one of the most effective treatment of vitiligo. Psoralen is either used orally or topically and after that skin is exposed to UVA rays which helps in repigmentation.

For more information on vitiligo visit:

http://www.vitiligoguide.com/vitiligo-light-laser-therapies/

PUVA-- A type of phototherapy that combines the oral or topical photosensitizing chemical psoralen, plus long-wave ultraviolet light-A (UVA).

topical steriod therapy

psoralen photochemotherapy(topical/oral)

In surgery- skin grafting (its an expensive affair)

The best result is through- ALTERNATIVE medicine - Homeopathy

Yes there are number of vitiligo treatments which are related with ultraviolet radiation for example UVB narrowband therapy and PUVA (Combination of Psoralen and Ultraviolet A).

For more information on vitiligo treatments visit:

http://www.vitiligoguide.com/vitiligo-treatment/