Mayo Clinic Health Manager
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Get StartedWhen to seek medical advice
By Mayo Clinic staffSee your doctor if you develop any of the following signs:
- A large scaly patch on your back, chest or abdomen
- A rash across your back, chest or abdomen
- A rash on your arms, legs or face
Also contact your doctor if you've been diagnosed with pityriasis rosea, and the rash doesn't go away within three months.