Pityriasis rubra pilaris (also known as "Devergie's disease," "Lichen ruber acuminatus," and "Lichen ruber pilaris") refers to a group of chronic disorders characterized by reddish orange, scaling plaques and keratotic follicular
papules. Symptoms may include reddish-orange patches (Latin:
rubra) on the skin, severe flaking (Latin:
pityriasis), uncomfortable itching, thickening of the skin on the feet and hands, and thickened bumps around
hair follicles (Latin:
pilus for hair). For some, early symptoms may also include generalized swelling of the legs, feet and other parts of the body. PRP has a varied clinical progression and a varied rate of improvement. There is no known cause or cure although stress is a common factor.