My friend is having vitiligo - a small patch in his head . what is it's permanent treatment?

Vitiligo: Therapy for vitiligo takes a long time-it usually must be continued for 6 to 18 months. The choice of therapy depends on the number of white patches; their location, sizes, and how widespread they are; and what you prefer in terms of treatment. Each patient responds differently to therapy. Current treatment options for vitiligo include topical medication, phototherapy, surgery, and others.

Skin gafting is best: Some topical medications may help.