• Twenty patients with symptomatic and extensive pityriasis rosea were treated with unilateral UV-B phototherapy in a bilateral comparison study. Five consecutive daily erythemogenic exposures resulted in substantially decreased pruritus and extent of disease greater than that on the untreated side in approximately 50% of the patients. Therapy seems to be most beneficial to patients receiving treatment within the first week of the eruption.
(Arch Dermatol 1983;119:381-382)
Arndt KA, Paul BS, Stern RS, Parrish JA. Treatment of Pityriasis Rosea With UV Radiation. Arch Dermatol. 1983;119(5):381–382. doi:10.1001/archderm.1983.01650290021010