BACK TOTOP Browse A-ZSearchBrowse A-ZABCDEFGHIJKLMNOPQRSTUVWXYZ0-9 E-mail FormEmail ResultsName:Email address:Recipients Name:Recipients address:Message: Print-FriendlyBookmarksbookmarks-menuPityriasis roseaRash - pityriasis rosea; Papulosquamous - pityriasis rosea; Herald patchPityriasis rosea is a common type of skin rash seen in young adults. Causes Pityriasis rosea is believed to be caused by a virus. It occurs most often in the fall and spring.Although pityriasis rosea may occur in more than one person in a household at a time, it is not thought to spread from one person to another. Females seem to be more affected than males. Symptoms Attacks most often last 4 to 8 weeks. Symptoms may disappear by 3 weeks or last as long as 12 weeks.The rash starts with a single large patch called a herald patch. After several days, more skin rashes will appear on the chest, back, arms, and legs.PatchA patch is a flat area of color change in the skin that is 1 cm or more wide.ImageRead Article Now Book Mark Article The skin rashes:Are often pink or pale red Are oval in shape May be scaly May follow lines in the skin or appear in a "Christmas tree" pattern May itch Other symptoms may include:Headache Fatigue Sore throat Mild fever Exams and Tests Your health care provider can often diagnose pityriasis rosea by the way the rash looks.In rare cases, the following tests are needed: A blood test to be sure it is not a form of syphilis, which can cause a similar rash A skin biopsy to confirm the diagnosis Skin biopsyA skin lesion biopsy is when a small amount of skin is removed so it can be examined. The skin is tested to look for skin conditions or diseases. A...ImageRead Article Now Book Mark Article Treatment If symptoms are mild, you may not need treatment.Your provider may suggest gentle bathing, mild lubricants or creams, or mild hydrocortisone creams to soothe your skin.Antihistamines taken by mouth may be used to reduce itching. You can buy antihistamines at the store without a prescription.Moderate sun exposure or ultraviolet (UV) light treatment may help make the rash go away more quickly. However, you must be careful to avoid sunburn. Outlook (Prognosis) Pityriasis rosea often goes away within 4 to 8 weeks. It usually doesn't come back. When to Contact a Medical Professional Call for an appointment with your provider if you have symptoms of pityriasis rosea.Open ReferencesReferencesDinulos JGH. Psoriasis and other papulosquamous diseases. In: Dinulos JGH, ed. Habif's Clinical Dermatology: A Color Guide in Diagnosis and Therapy. 7th ed. Philadelphia, PA: Elsevier; 2021:chap 8.James WD, Elston DM, Treat JR, Rosenbach MA, Neuhaus IM. Pityriasis rosea, pityriasis rubra pilaris, and other papulosquamous and hyperkeratotic diseases. In: James WD, Elston DM, Treat JR, Rosenbach, MA, Neuhaus IM, eds. Andrews' Diseases of the Skin: Clinical Dermatology. 13th ed. Philadelphia, PA: Elsevier; 2020:chap 11.AllVideoImagesTogPityriasis rosea on the chest - illustration Pityriasis rosea is a skin disease that produces oval spots (papules) over the trunk. The rash is frequently preceded by a herald patch (pictured here) lasting 1 to 2 weeks. The rash is usually rose red to brownish red with fine scales and central clearing. Itching (pruritus) occasionally occurs. Spontaneous remission occurs in 2 to 8 weeks. It is probably caused by an infectious agent, most likely a virus.Pityriasis rosea on the chestillustrationPityriasis rosea on the chest - illustration Pityriasis rosea is a skin disease that produces oval spots (papules) over the trunk. The rash is frequently preceded by a herald patch (pictured here) lasting 1 to 2 weeks. The rash is usually rose red to brownish red with fine scales and central clearing. Itching (pruritus) occasionally occurs. Spontaneous remission occurs in 2 to 8 weeks. It is probably caused by an infectious agent, most likely a virus.Pityriasis rosea on the chestillustrationRelated Information Patches(Symptoms) Review Date: 10/10/2020 Reviewed By: Linda J. Vorvick, MD, Clinical Associate Professor, Department of Family Medicine, UW Medicine, School of Medicine, University of Washington, Seattle, WA. Also reviewed by David Zieve, MD, MHA, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team. The information provided herein should not be used during any medical emergency or for the diagnosis or treatment of any medical condition. A licensed medical professional should be consulted for diagnosis and treatment of any and all medical conditions. Links to other sites are provided for information only -- they do not constitute endorsements of those other sites. © 1997- © 1997- All rights reserved. A.D.A.M. content is best viewed in IE9 or above, Firefox and Google Chrome browser.Content is best viewed in IE9 or above, Firefox and Google Chrome browser.