Welcome to Healthcare Magic,
As per your query your daughter had dog bite 3 weeks ago and presently she has pee sized sore on both arms.
Now the very first hing is to check for the immunization
status of the dog from the owner of the dog. If the dog is immunized within a year then there is no concern but if the dog was not immunized then you should meet the doctor at the earliest and your daughter should receive the immunization for both tetavc and dog bite. Now as you are meeting the doctor tomorrow so you it is a good part to get the best medical suggestion from that side.
In between kindly ask your daughter to not to scratch any skin lesion or even try to touch unnecessarily. This is the most important part in your treatment.
Hope to have provided the helpful informations regarding your problem.
With good health wishes"
Dr Sanjay Kumar Kanodia
MD (Dermatology & STD/Venereology)