Classification Dr. W.A.D. Griffiths, from Great Britain, classified six forms of<unk>  in the early 1980s. At this time, the causes of<unk>  are still unknown and symptoms can be difficult to diagnose. Frequently, more than one medical professional will be consulted before an accurate<unk>  diagnosis is made. Dermatologists have identified both an acquired form and an inherited form (familial) of<unk>  and have described them in medical journals. The acquired form usually shows a spontaneous or gradual remission of symptoms within several years although long-term symptoms may continue for years. The inherited form starts early in childhood with persistent long-term symptoms into adulthood. Although most people who develop<unk>  are over age 50, individuals of any age, race, and nationality can be affected. Women and men seem to be equally affected.
Pityriasis rubra pilaris
Phytophotodermatitis
Pityriasis rotunda
Granulomatous facial dermatitis
Pityriasis rosea
Ichthyosis bullosa of Siemens
Polymorphous light eruption
Pityriasis alba