Doctor Betti Dr. Betti Hertzberg Ressler is a Board Certified Pediatrician on staff at Miami Children's Hospital. Dr. Hertzberg developed the toilet training video "Let's Go Potty." She is the co-author of "The Doctor's Book of Home Remedies for Children." Bad breath Question: Is a funny mouth odor in a three month old baby a sign of being sick or infection? Zaida Answer: A 3-month-old baby should not have any strange odors on their breath. Usually, babies (unless an infection is present), have a pleasant and sometimes sweet breath. A throat or mouth infection should be looked into. Have your baby's pediatrician checked this out? If your baby is otherwise well and in good spirits, it may be something that can be remedied by having baby drink some water after feeding. This will rinse out any remaining formula or food that is left. Remember to keep all pacifiers very clean as well as other objects that come in contact with baby's mouth. At this time, your baby may be teething which means that his or her fist may be trying to find it's way into the mouth. The skin cannot be sterilized, so keep it as clean as possible. If there is an infection or some other problem, your child's pediatrician will be in the best position to advise you on what to do. Also see: My 10 year old daughter is incredibly prone to insect bites. Even when no one else is getting bitten, they seem to go for her! Any suggestions? My 12 year old daughter experiences difficulty sleeping due to fear of the dark and being alone. Is this normal? Ask Dr. Betti your questions This information is not intended to be a substitute for visiting your pediatrician. If you or your child has specific concerns, you should see your doctor for a diagnosis and treatment.