These patches most often appear on your chest, abdomen, or back. This fairly common skin ... Note: Pityriasis rosea is commonly called "Christmas tree rash" because of its characteristic tree ...

Inverse pityriasis rosea usually causes a rash on the armpits ... Pityriasis rosea usually develops on the chest, back, or abdomen. Instead, inverse pityriasis rosea affects the armpits or ...

The rash is also called Christmas tree rash because it usually starts with ... This larger patch appears first and can be found on the chest, back, or abdomen. It’s called the mother patch ...