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.
When these fragile blood vessels break, people develop red or purple blemishes or bruises (purpura) on the skin. Amyloidosis. Amyloidosis causes the protein amyloid to be deposited within blood vessels in the skin and subcutaneous tissues, which may increase the fragility of the blood vessels, causing purpura.