Pityriasis Rosea
Pityriasis Rosea Causes
Pityriasis rosea is similar to infectious exanthems in that it occurs in clusters among contacts, has a seasonal predilection to spring and autumn, and has a low rate of recurrence (3%).
Pityriasis Rosea Definition
Pityriasis rosea is a common human skin disease which presents as numerous patches of pink or red oval rash, mainly on the torso. Although the cause remains unknown, it is most likely a virus. Antibiotics like Erythromycin have been found to be completely ineffective. The condition appears to be completely non-contagious.
Pityriasis Rosea Diagnosis
In cases of severe itching, topical or oral steroids may be prescribed. (Steroids provide relief from itching and improve the appearance of the rash, but they also ensure that the new skin that forms after the rash subside will take a longer time to match the surrounding skin color).
Pityriasis Rosea Symptoms and Signs
The symptoms of this condition include: Large patches of pink or red, flaky, oval-shaped rash on the torso, similar to ringworm, psoriasis or discoid eczema; A single, large red "herald" patch may occur 1 to 20 days before smaller, more numerous patches of rash; The "herald" patch may be preceded by a sore throat of varying severity. The more numerous oval patches generally spread widely across the chest, often following the rib-line.
Pityriasis Rosea Treatment
There is no exact treatment necessary. The disease appears to be entirely self-limiting in all cases. Usually the condition lasts a matter of weeks, but in some cases can last longer (up to six months). UV therapy or exposure to sunlight helps in some cases; serious precautions should be taken to avoid sunburn.