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 Rash: Symptoms, Causes, & Treatment - WebMD
2023年10月24日 · Pityriasis rosea, a rash that usually appears on the torso, upper arms, thighs, or neck, may sound worse than it really is. The condition has a name that’s hard to say: pit-ih-RIE-uh-sis...
Pityriasis Rosea (Christmas Tree Rash): Causes & Treatment
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 - DermNet
Pityriasis rosea is a self-limiting rash, which resolves in about 6–10 weeks. It is characterised by a large circular or oval "herald patch", usually found on the chest, abdomen, or back. The herald patch is followed some time later, typically two weeks or so, by the development of smaller scaly oval red patches, resembling a Christmas tree ...
Pityriasis rosea: Signs and symptoms - American Academy of Dermatology
2024年3月1日 · Pityriasis rosea is a common condition, which causes a harmless rash on the skin. The rash usually lasts 6 to 8 weeks before disappearing, but it can last longer. Where does pityriasis rosea appear on the body? The rash can develop anywhere on the skin or scalp. However, it usually begins on the chest, abdomen, or back and spreads.
Pityriasis rosea - Diagnosis & treatment - Mayo Clinic
2022年10月11日 · In most cases, your health care provider can identify pityriasis rosea by looking at the rash. You might need a scraping or possibly a skin biopsy, which involves taking a small piece of the rash for testing.
Pityriasis rosea - Wikipedia
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". [2] This is then followed, days to weeks later, by an eruption of many smaller scaly spots; pinkish with a red edge in people with light skin and greyish in …
Pityriasis Rosea - Johns Hopkins Medicine
What is pityriasis rosea? 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 - Dermatologic Disorders - Merck Manual …
Pityriasis rosea is a self-limited, inflammatory disorder of the skin possibly caused by human herpesvirus types 6, 7, or 8 or medications. An initial 2- to 10-cm herald patch is followed by centripetal eruption of oval papules and plaques with a slightly raised and scaly border, typically appearing along skin lines.
Pityriasis rosea: FAQs - American Academy of Dermatology
2024年3月1日 · It's also possible to develop a rash that looks like pityriasis rosea after you take a medication or get a vaccine. This rash isn’t pityriasis rosea. It’s caused by a reaction to the medication or vaccine.
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