There is no known cause of this disease; There is some evidence associating it with Parvovirus B19.
Pityriasis lichenoides et varioliformis acuta
Pityriasis amiantacea
Pityriasis lichenoides chronica
Granulosis rubra nasi
Keratoderma blennorrhagicum
Keratosis follicularis spinulosa decalvans
Tinea versicolor
Shiitake mushroom dermatitis