D.W.
N.,
It is very common for kiddos to get "cold sores". Check her palms and the soles of her feet- if she has small blisters on those too she may have hand foot and mouth- a virus that has no real treatment. Here is a good article: http://www.babycenter.com/refcap/toddler/toddlerills/todt...
Our office also recommends an equal amount of Benadryl liquid mixed w/ maalox (give 1 tsp Benadryl per 25# body weight). The Benadryl will numb the sores, the maalox can help to coat them.
Lots of fluids, yogurt, jello etc.... They usually last 5-10 days.
D. (wearing my Pedi RN hat)