patch of pityriasis rosea

Sometimes ultraviolet light administered in a doctor's office or by careful sunbathing can diminish the itching sufficiently to be tolerable.
"Pityriasis rosea and the need for a serologic test for syphilis".
Large size or confluent plaques, unusual distribution of skin lesions, eg iso thousand arms indowebster inverse pattern, with prominent involvement of the skin folds (armpits and groin or greater involvement of limbs than the trunk.
"Evidence of human herpesvirus-6 and -7 reactivation in miscarrying women with pityriasis rosea".Does pityriasis rosea cause any complications?Journal of the American Academy of Dermatology.Kliegman RM,.John Wiley and needed a b "Pityriasis rosea".Atypical pityriasis rosea may be diagnosed when the rash has features such as: Atypical morphology, eg papules (small bumps vesicles (blisters urticated plaques (weal-like purpura (bruising target lesions ( erythema multiforme -like).42 (2 Pt 1 2414.8, in children, presentation can be atypical or inverse, and the course is typically milder."Pityriasis rosea: An important papulosquamous disorder".

Goldstein AO,.
Pityriasis rosea is mildly itchy in 50 of cases and clears spontaneously in an average of six to eight weeks.
Pityriasis-rosea like drug eruptions have been caused by angiotensin-converting enzyme inhibitors, nonsteroidal anti-inflammatory drugs, hydrochlorothiazide, imatinib, clozapine, metronidazole, terbinafine, gold and atypical antipsychotics.Called a herald patch, this spot can be up to 4 inches (10 centimeters) across.It is an oval pink or red plaque 25 cm in diameter, with a scale trailing just inside the edge of the lesion like a collaret."A Randomized, Double-blind, Placebo-Controlled Study of Efficacy of Oral Acyclovir in the Treatment of Pityriasis Rosea".The exclusional clinical features are the following: Multiple small vesicles at the centre of two or more lesions, Two or more lesions on palmar or plantar skin surfaces, and Clinical or serological evidence of secondary syphilis.5 It is more common in spring.Severe itch, prolonged course of disease, multiple recurrences.In: Nelson Textbook of Pediatrics.Clinical Dermatology: A Clinical Guide to Diagnosis and Therapy (4th.).7, occasionally, the "herald" patch may occur in a 'hidden' position (in the armpit, for example) and not be noticed immediately.