Did you ever find out what this was? My two-year-old is having the same thing and our dermatologist's appointment is not until Wednesday but we are really anxious to find out what it could be..
Hello,
Without examination,confirmation of a diagnosis is tough but it can be pityriasis rosea,dermatitis,sweat dermatitis or some viral illness like fifth’s disease.
I would suggest a dermatologist’s evaluation because the treatment is different for all and confirmation of diagnosis is necessary for the same.
Hope it helps.Take care and pls do keep me posted on how you are doing or if you have any additional queries.Warm regards.