Vitiligo is quite a common condition which makes the skin, and sometimes the hair, turn white in patches. This is because melanocytes, the cells which give the skin its colour, have been damaged.
Vitiligo is not contagious. You cannot pass it on to someone else by touching them and it is not infectious. Vitiligo is considered to be an ‘autoimmune’ condition in which the immune system attacks the body’s own tissues.