Pityriasis rosea - Symptoms & causes - Mayo Clinic
2024年7月12日 · Pityriasis rosea is a rash that often begins as an oval spot on the face, chest, abdomen or back. This is called a herald patch and may be up to 4 inches (10 centimeters) across. Then you may get smaller spots that sweep out from the middle of the body in a shape that looks like drooping pine-tree branches.
Pityriasis rosea: Causes - American Academy of Dermatology
2024年3月1日 · What causes pityriasis rosea? Why some people get this disease is still a bit of a mystery. It’s likely caused by a virus. Dermatologists have found human herpesviruses in the rash, blood, and saliva of people who have pityriasis rosea. How can herpesviruses cause pityriasis rosea? These are many types of human herpesviruses.
Pityriasis Rosea - Johns Hopkins Medicine
Pityriasis rosea is a type of skin rash. It is also called Christmas tree rash. It starts with 1 large, scaly patch. It may be round or oval. This is called the herald patch. It then causes many more small patches. The rash most often appears on the chest, back, and belly. It can take 1 to 3 months to go away.
Pityriasis Rosea (Christmas Tree Rash): Causes & Treatment
2022年6月17日 · Pityriasis rosea (pih-tuh-RY-uh-sis ROH-zee-uh) is a common skin condition that causes patches of your skin to develop raised, scaly rashes. It may appear on any part of your body, but it usually appears on the trunk (torso), arms and legs.
Pityriasis Rosea - Pityriasis Rosea - The Merck Manuals
Pityriasis rosea is a self-limited, inflammatory disease characterized by diffuse, scaling papules or plaques. Diagnosis is clinical. Treatment is usually unnecessary. Pityriasis rosea most commonly occurs between ages 10 and 35. It affects women more often.
Pityriasis Rosea - StatPearls - NCBI Bookshelf
2024年3月1日 · The exact cause of PR is unknown; however, features like seasonal variation and community clustering suggest that it is an infectious disease. Infections like viruses, bacteria, and spirochetes, as well as noninfective causes like atopy and …
Pityriasis rosea: Diagnosis and treatment - American Academy of Dermatology
2024年3月1日 · If you have pityriasis rosea, the rash will go away without treatment. In children, the rash usually clears in 16 days. Teens and adults tend to have the rash for 6 to 8 weeks, but it can take longer for your skin to clear.
Pityriasis rosea - Diagnosis & treatment - Mayo Clinic
2022年10月11日 · Pityriasis rosea usually goes away on its own without treatment in 4 to 10 weeks. If the rash doesn't disappear by then or the itching bothers you, talk with your health care provider about treatments. The condition clears up without scarring and …
Pityriasis rosea: FAQs - American Academy of Dermatology
2024年3月1日 · You’re most likely to get pityriasis rosea between 10 and 35 years of age; however, this condition can occur at any age. People around the world develop it, and pityriasis rosea affects folks of all skin tones.
Pityriasis Rosea - Pityriasis Rosea - Merck Manual Consumer Version
Pityriasis rosea is a disease that causes the formation of many small patches of scaly, rose-colored or tan-colored patches on the skin. Pityriasis rosea may be caused by a viral infection.