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.
Quick and Long-Term Fixes for Blotchy Skin. While blotchy skin can be caused by a number of factors you cannot control, including heredity, there are also factors that you can manage, such as sun damage. Your skin speeds up the production of skin cells called melanocytes to protect against sunlight.