what rash has a herald patch
Many people with pityriasis rosea have no other symptoms, but the rash sometimes follows a few days after a upper respiratory viral infection (cough, cold, sore throat or similar). The herald patch. The herald patch is a single plaque that appears 1â20 days before the generalised rash of pityriasis rosea. It is an oval pink or red plaque 2â5 cm in diameter, with a scale trailing just inside the edge of the lesion like a collaret.