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.
Before you use anything, try this. Seasonal Blotchy Skin. Extreme temperatures can cause skin to break out in a heat rash, which can cause blotchy skin to appear on the face, chest, and neck. High winds can also cause these blotchy patches, especially on days that are dry.