Any of a number of drugs and other substances containing chemicals that react with ultraviolet (UV) light to cause darkening of the skin.
Erythrodermic psoriasis; Flexural psoriasis; Guttate psoriasis; Inverse psoriasis; Plaque psoriasis ; Psoriatic arthritis.
- Psoriasis vulgaris
well-defined plaques of red raised skin that can appear on any area of skin, although the knees, elbows, scalp and trunk are the most common locations. The flaky silvery white buildup on top of the plaques is called scale; it is composed of dead skin cells. This scale comes loose and sheds constantly from the […]
- Psoriasis, erythrodermic
A particularly inflammatory form of psoriasis that often affects most of the body surface. It is the least common form of psoriasis and often appears on people who have unstable plaque psoriasis, where lesions are not clearly defined. The erythrodermic form of psoriasis is characterized by periodic, widespread, fiery redness of the skin. The erythema […]
- Psoriasis, flexural
A form of psoriasis found in the armpits, groin, under the breasts and in other flexion creases (skin folds) such as those around the genitals and buttocks. This form of psoriasis appears as smooth areas of skin that are red and inflamed but do not have the scaling associated with plaque psoriasis (the most common […]
- Psoriasis, guttate
A type of psoriasis characterized by red, scaly areas of inflamed skin on all parts of the body. It is associated with a strep infection in many cases.