Christmas Tree Pattern Herald Patch

Pityriasis rosea is a self-limiting rash, which resolves in about 6-10 weeks. It is characterised by an initial large "herald patch" followed by smaller patches resembling a christmas tree. These patches are smaller than the herald patch - they range from 1 to 2 cm - and are often called "daughter" patches.

They develop in a pattern that resembles sagging Christmas tree branches. In approximately 50% of people with pityriasis rosea, the patches itch. Pityriasis rosea is a common self.

Before the herald patch appears, some people have headache, fatigue, fever or sore throat. A few days to a few weeks after the herald patch appears, you may notice smaller bumps or scaly spots across your face, back, chest or abdomen that look like a pine. Usually, a doctor may make a diagnosis of pityriasis rosea solely based on its appearance, particularly the onset of the distinct large herald patch and the symmetrical Christmas tree presentation.

Also, the herald patch tends to have a fine scale with a definite border, the so-called "collarette.". A week or two after the herald patch appears, it is joined by "daughter patches" - smaller, scaly rashes that form on your chest or back, often in the shape of a Christmas tree. Christmas tree rash, or pityriasis rosea, is an oval-shaped skin patch that can appear on different parts of your body.

Here's how to identify it and what to do if you have it. Christmas tree rash is a relatively common skin condition. The medical name for it is pityriasis rosea.

It typically starts with one large oval or oblong patch, called a herald patch or mother patch. This patch can be very large, up to four inches across, on the chest, back or stomach. It is usually pink or salmon-colored and may appear scaly.

After about two weeks, smaller patches. This "herald patch" is usually located on the trunk, neck, or upper arms. The herald patch is followed 1-3 weeks later by the development of a widespread rash of pityriasis rosea, with smaller (0.5-2 cm) oval patches of pink-to-red, scaly skin on the trunk and upper arms.

The second rash may form a "Christmas tree" pattern on the back. The herald patch is commonly followed by the development of secondary erythematous papules and plaques, aligning with Langer's lines to form a specific distribution pattern, resembling a Christmas tree on the back and a V-shaped pattern on the upper chest. Therefore, diagnosing PR may not be difficult based on its typical clinical presentation.