Your granddaughter appears to be allergic to the antibiotic which has caused the rash you mention here.Please note the name and avoid its use in the future. In any case she does not need an antibiotic for a viral infection. So stop the antibiotic. This illnesss usually lasts for at least 5 to 7 days and she will get better by herself. Give your granddaughter a good probiotic now such as Reuteri drops 1ml daily for 10 days.
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