How is pityriasis rosea diagnosed?
Pityriasis rosea is usually diagnosed based on a medical history and physical examination of your child. Due to the uniqueness of the pityriasis rosea rash, your child's physician can typically make a diagnosis based on a simple physical examination. Your child's doctor may also order the following tests to help aid in the diagnosis:
- blood tests
- skin biopsy - the removal of some of the diseased skin for laboratory analysis
The sample of skin is removed after a local anesthetic is administered