Vitiligo or white patches is called as 'Safed daag' in Hindi and 'Kod' in Marathi. Vitiligo is a skin disease in which the pigment cells of the skin i.e. melanocytes, are destroyed in certain areas. Melanocytes are the cell by which skin pigment known as melanin is formed. So, due to the destruction of melanocytes, there occurs a loss of skin color in the form of depigmented or white patches of skin on the body.