just been to the doctors and my daughter has impertigo- it started as a tiny cut in her nose and due to her sucking her thumb with a blanket (which is washed every 2 days!!! hate the thing) it has spread/turned into impetigo.
To look at it it just looks like a sore up her nose.
when asked about school doctor said 'school is important so I would send her...' would you? She is not under the weather or anything.