Triggers may include inflammatory skin conditions, burns, intralesional steroid injections and abrasions.Other conditions with similar symptoms include the following:

Albinism
Halo nevus
Idiopathic guttate hypomelanosis (white sunspots)
Piebaldism
Pityriasis alba
Postinflammatory hypopigmentation
Primary adrenal insufficiency
Progressive macular hypomelanosis
Tinea versicolor
Tuberculoid leprosy

Treatment
There is no cure for vitiligo but several treatment options are available. The best evidence is for applied steroids and the combination of ultraviolet light in combination with creams. Due to the higher risks of skin cancer, the United Kingdoms National Health Service suggests phototherapy be used only if primary treatments are ineffective. Lesions located on the hands, feet, and joints are the most difficult to repigment; those on the face are easiest to return to the natural skin color as the skin is thinner in nature. Immune mediators
Topical preparations of immune suppressing medications including glucocorticoids (such as 0.05% clobetasol or 0.10% betamethasone) and calcineurin inhibitors (such as tacrolimus or pimecrolimus) are considered to be first-line vitiligo  treatments.In July 2022, ruxolitinib cream (sold under the brand name Opzelura) was approved for medical use in the United States for the treatment of vitiligo. Phototherapy
Phototherapy is considered a second-line treatment for vitiligo. Exposing the skin to light from UVB lamps is the most common treatment for vitiligo. The treatments can be done at home with an UVB lamp or in a clinic. The exposure time is managed so that the skin does not suffer overexposure. Treatment can take a few weeks if the spots are on the neck and face and if they existed not more than 3 years.
The procedure involved taking a thin layer of pigmented skin from the persons gluteal region. Melanocytes were then separated out to a cellular suspension that was expanded in culture. The area to be treated was then denuded with a dermabrader and the melanocytes graft applied. Between 70 and 85 percent of people with vitiligo experienced nearly complete repigmentation of their skin. The longevity of the repigmentation differed from person to person. References
External links

Vitiligo at Curlie
Questions and Answers about Vitiligo – US National Institute of Arthritis and Musculoskeletal and Skin Diseases