Not sure, but you should be getting into the habit of brushing her gums/teeth 1-2 times a day with a fingerbrush or thin washcloth wraped overa finger. This will help your daughter get used to the idea of brushing her teeth as she gets older, and it will help her have a cleaner mouth which may help her bad breath. I imagine that if it is caused by her cold, it will go away on it's own. Call the pediatrician for advice if needed.
State Certified Early Childhood Special Education Teacher
New Mom as of March 2009!