User:Mr. Ibrahem/Pityriasis rosea
| Pityriasis rosea | |
|---|---|
| Other names | Pityriasis rosea Gibert[1] |
 | |
| Pityriasis rosea on the chest and abdomen | |
| Specialty | Dermatology, infectious disease |
| Symptoms | Single red and slightly scaly area, followed by small pink bumps and oval patches that expand and join covering chest, back, and abdomen[2][3] |
| Usual onset | 10 to 35 years old[4] |
| Duration | Less than three months[4] |
| Causes | Unclear,[5] likely a response to virus[2] |
| Diagnostic method | Based on symptoms[4] |
| Differential diagnosis | Tinea corporis, viral rash, pityriasis versicolor, nummular eczema, seborrheic dermatitis, psoriasis, secondary syphilis, drug eruptions[5][2] |
| Treatment | Supportive care[5][4] |
| Medication | Usually none[2] |
| Frequency | 1.3% (at some point in time), females > males[5][2] |
Pityriasis rosea is a type of skin rash.[2] Classically, it begins with a single red and slightly scaly area known as a "herald patch".[3][6] This is then followed, days to weeks later, by many smaller scaly spots; pinkish with a red edge in lighter skin and grayish in darker skin.[7] It typically lasts less than three months and goes away without treatment.[5] Sometime a fever may occur before the start of the rash or itchiness may be present, but often there are few other symptoms.[5]
While the cause is not entirely clear, it is believed to be related to human herpesvirus 6 (HHV6) or human herpesvirus 7 (HHV7).[3] It does not appear to be contagious.[5] Diagnosis is based on the symptoms.[4] It may look similar to Tinea corporis, viral rash, pityriasis versicolor, nummular eczema, seborrheic dermatitis, psoriasis and secondary syphilis.[5][2] Certain medications may also result in a similar rash.[5]
Evidence for specific treatment is limited.[5][3] If itchy or inflamed, a steroid cream or moisturiser may be applied.[3] Steroids by mouth or aciclovir may be considered in severe cases.[3][8] About 1.3% of people are affected at some point in time.[5] It most often occurs in those between the ages of 10 and 40.[2][9] There may be more cases in spring and autumn.[3] The condition was described at least as early as 1798.[1]
References
[edit]- ^ a b Bolognia, Jean L.; Jorizzo, Joseph L.; Rapini, Ronald P. (2003). Dermatology. Mosby. p. 183. ISBN 9789997638991. Archived from the original on 2017-11-10. Retrieved 2017-11-10.
- ^ a b c d e f g h James, William D.; Elston, Dirk; Treat, James R.; Rosenbach, Misha A.; Neuhaus, Isaac (2020). "11. Pityriasis rosea, pityriasis rubra pilares, and other papulosquamous and hyperkeratotic diseases". Andrews' Diseases of the Skin: Clinical Dermatology (13th ed.). Edinburgh: Elsevier. pp. 205–206. ISBN 978-0-323-54753-6. Archived from the original on 2021-11-03. Retrieved 2021-11-03.
- ^ a b c d e f g Morris-Jones, Rachael (2019). "14. Viral infections". In Morris-Jones, Rachael (ed.). ABC of Dermatology (7th ed.). Hoboken: Wiley Blackwell. pp. 116–117. ISBN 978-1-119-48899-6. Archived from the original on 2022-05-16. Retrieved 2022-06-09.
- ^ a b c d e "Pityriasis Rosea". NORD (National Organization for Rare Disorders). 2015. Archived from the original on 20 February 2017. Retrieved 10 November 2017.
- ^ a b c d e f g h i j k Eisman, S; Sinclair, R (29 October 2015). "Pityriasis rosea". BMJ (Clinical Research Ed.). 351: h5233. doi:10.1136/bmj.h5233. PMID 26514823.
- ^ Gay, John T.; Huq, Madiha; Gross, Gary P. (2023). "Herald Patch". StatPearls. StatPearls Publishing. Archived from the original on 2023-01-25. Retrieved 2023-04-01.
- ^ Onalaja, Amanda A.; Taylor, Susan C. (2021). "1. Defining skin color". In Li, Becky S.; Maibach, Howard I. (eds.). Ethnic Skin and Hair and Other Cultural Considerations. Switzerland: Springer. p. 10. ISBN 978-3-030-64829-9. Archived from the original on 2022-09-20. Retrieved 2022-08-29.
- ^ Khan, Rameez (8 January 2024). "#356: (A)dressing the Christmas Tree? Therapies for pityriasis rosea". CFPCLearn. Archived from the original on 11 January 2024. Retrieved 8 January 2024.
- ^ Johnstone, Ronald B. (2017). "5. Spongiotic reaction pattern: Pityriasis rosea". Weedon's Skin Pathology Essentials (2nd ed.). Elsevier. p. 73. ISBN 978-0-7020-6830-0. Archived from the original on 2021-05-25. Retrieved 2021-11-03.