Pityriasis Rosea is a rash that usually begins with a large, scaly, pink patch on the chest or back. It is frequently confused with ringworm, however antifungal creams do not help because it is not a fungus.
Eventually, the patches take on an oval shape and may form a pattern over the back similar to the outline of a Christmas tree. Sometimes the disease can produce a very severe and widespread skin eruption, along with fatigue and aching. Within six to eight weeks, the rash usually disappears, however it can sometimes last much longer.
Pityriasis rosea often requires no treatment, however, external or internal medications may be prescribed to relieve itching. Ultraviolet light treatments given under the supervision of a dermatologist may be helpful.