noun. 1  a. A cylindrical, usually metal casing containing the primer and charge of ammunition for firearms. 2  A case filled with high explosives, used in blasting. 3  A small modular unit designed to be inserted into a larger piece of equipment: an ink cartridge; a disposable cartridge of caulking compound. A removable case containing the stylus and electric conversion circuitry in a phonograph pickup.
Guttate psoriasis causes a rash formed of drop-shaped salmon-pink areas on the chest, arms, legs and scalp. Guttate psoriasis. Red drop-like lesions are found on the skin. Image courtesy of Dr Hon Pak.
Guttate Psoriasis Treatment and Causes. There are many forms of psoriasis, which differ not only by their symptoms, but also by a place of localization of psoriatic skin lesions. It may appear on your face, scalp, body, on legs or arms. Sometimes psoriatic plaques are itchy but usually when you have guttate psoriasis they do not itch.