Is a rash that usually begins as a large circular or oval spot on your chest, abdomen or back. Called a herald patch, this spot can be up to 4 inches across.
Pityriasis rosea typically begins with a large, slightly raised, scaly patch — called the herald patch — on your back, chest or abdomen. Before the herald patch appears, some people experience headache, fatigue, fever or sore throat.
A few days to a few weeks after the herald patch appears, you may notice smaller scaly spots across your back, chest or abdomen that resemble a pine-tree pattern. The rash can cause itching, which is occasionally severe.
Complete blood count (CBC)
Stool analysis - Protozoans and Helminths (microscopy)