brimstone - an old name for sulfur. native sulfur, native sulphur. atomic number 16, sulfur, sulphur, S - an abundant tasteless odorless multivalent nonmetallic element; best known in yellow crystals; occurs in many sulphide and sulphate minerals and even in native form (especially in volcanic regions)
These patches of red, and sometimes irritated or itchy, skin can appear anywhere on the body, but they are most commonly found on the arms, neck, and face. These blotchy patches can be caused by a variety of factors, such as weather, genetics, allergies, or environmental conditions.
Causes and Risk Factors. The light/white blotches of skin associated with vitiligo form when melanocytes fail to produce melanin. It is not known what causes melanocytes to die or stop producing melanin, but the following may play a role: 1  Autoimmune disease.2  Autoimmune diseases occur when the body mistakenly attacks and destroys its own cells.he light/white blotches of skin associated with vitiligo form when melanocytes fail to produce melanin. It is not known what causes melanocytes to die or stop producing melanin, but the following may play a role: 1  Autoimmune disease.