- An autoimmune disorder, in which the immune system becomes overactive and destroys the melanocytes
- Heredity - Its g genetic heredity disease which passes from one generation to other like if the parents are involved with such contacts but the symptoms were not observed can be seen in the progeny.
- A trigger event, such as sunburn, stress or exposure to industrial chemicals— The condition is photosensitive. This means that the areas that are affected will be more sensitive to sunlight. The accidental situation which trigger any genetic changed in body which stops the proliferation of cells.
The Melanin count from the upper level is decreased because the melanine synthesising protein is not synthesized and the exponential decrease in the protein leads to decrease in melanine numbers. Genetic changes occurred in genes because of U V Lights or others source tends to change the character and behaviour of genes the melanine is not synthesized and change in tyrosine amino acid makes the melanine cell dies or stop the synthesizing melanine.