Vitiligo vulvar, best treatment is -
VITILIGO 

Acquired, an idiopathic disorder characterised by hypomelanosis of skin and hair together with the development of white macules with an absence of melanocytes on microscopy.

Types:-
1. Localised - segmental and focal.

Segmental-one/ more macules distributed in dermatomal or quasi-dermatomal pattern.
Focal-one/more macules distributed in a single area but not in a dermatomal pattern.

2. Generalised 

Vitiligo vulgaris- most common.Depigmented macules in symmetrical pattern.
Acromucosal
Universal

Treatment:

Vitiligo vulgarities-PUVA (psoralen+UVA).Topical or oral psoralen combined with UV A (320-400nm) irradiation is effective for treating vitiligo.
Coaltar
PUVA
Steroids
All