Hello SG2,
Sorry to hear about this, skin issues are never fun for the little ones or their parents.
If this is a continuous reoccurring episode, I would certainly have it checked more thoroughly. It may be viral in nature like you suspected, but if you are treating the symptoms at home and they keep coming back, I think its time to re-evaluate. Perhaps it is a bacterial infection and she may need the use of
antibiotics. You mentioned that these papules have ruptured before, it would be a really good idea to have the practitioner obtain a sample for a culture, then you can know exactly what your dealing with and how to effectively treat it.
In the meantime, watch for
fever, and good hand washing and try to encourage her to avoid touching/scratching/picking the area :) Easier said than done.
Good luck!