Pityriasis rosea often begins with a single large, scaly, pink patch on the trunk, called a “herald” patch. A widespread rash usually follows one to two weeks later. The rash occurs on the trunk, limbs and neck, but rarely involves the face. The typical rash consists of small, oval pink to brown scaly patches arrange along the skin creases, giving an appearance of a ‘Christmas tree’ on the back. The rash is itchy in about half of the affected patients. It usually fades and disappears within six to eight weeks, but can sometimes last much longer. The patient is often otherwise well throughout the course of the rash.