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.
Pustular psoriasis, which causes pus-filled blisters. Attacks or flares can be caused by medications, infections, stress, or certain chemicals. Inverse psoriasis, which causes smooth, red patches in folds of skin near the genitals, under the breasts or in the armpits. Rubbing and sweating can make this type of psoriasis worse. Erythrodermic psoriasis, which causes red and scaly skin over much of your body. This can be a reaction to a bad sunburn or taking certain medications, such as corticosteroids. It can also happen if you have a different type of psoriasis that is not well controlled.