I m adding back in my image of the slapped cheeks as this was the definitive diagnostic symptom in my daughter s case As I said in response to David s request I think I ll leave my wording but thanks for the discussion At The Skin Disease Archive when talking about Fifth Disease they reference both rashes as being quite similar It is called slapped cheek syndrome because the children suffering from this disease show rosy slapped like cheeks It is the fifth of five common child diseases that cause similar skin rashes measles rubella scarlet fever Filatov Dukes disease and slapped cheek syndrome I believe this supports the wording that both diseases have a slapped cheek look as a possible symptom In my daughters case it was the symptom along with the white mustache that allowed a positive diagnosis Estreya talk