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.
Only a doctor can diagnose the cause of your red blotches. But the reality of visible skin rashes and ailments is that sometimes they're caused by nothing at all. Your skin can react to all sorts of chemicals, hormones-even temperature. Some people get very severe looking rashes for no apparent reason.