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.
Platelet disorders first cause small red or purple dots on the skin. Later, if the disorder becomes severe, bleeding may occur. A decrease in blood clotting factors usually causes bleeding and bruising. Defects in blood vessels usually cause red or purple spots and patches on the skin, rather than bleeding.