Pityriasis Rosea

• A common exantham that typically presents initially with a herald patch, followed by a generalized rash over the next 1-2 weeks and can last 4-6 weeks.
• Patients may initially have prodromal symptoms such as joint pain,headache, fever and malaise that precede the appearance of the rash.
• The primary plaque, herald patch, is seen on the skin in 50-90% of cases.
• The generalized rash typically develops in crops along the lines in the skin leading to a characteristic "Christmas tree" pattern.
• Pruritus is present in 75% of cases.
• Usually a self-limited, benign illness that does not require any treatment.  Though symptomatic treatment of the pruritus is reasonable.