Vitiligo is caused or affected by one or more factors at a time though the exact cause of the disease is not fully understood. It is termed as an autoimmune disease where body mistakes one of its parts as foreign then attacks and kill them. In vitiligo the immune system mistakes melanocytes as foreign and destroy it.
There are varieties of causes which can trigger this autoimmunity—
Emotional stress plays an important role in triggering autoimmunity.
Genetic or family history of vitiligo or other autoimmune diseases like hypothyroid in the background makes a person prone for vitiligo.
Hormonal changes during different stages of life mostly in women.
Use of some medicines such as corticosteroids may trigger it.
It may get triggered after an injury.
Occupational factors may also be responsible for its emergence.