The milk is mixed with digestive juices and has a sour smell. It may be that the baby just took some time to bring up air. It could also be a sign of illness. If the baby seems well and is eating normally, watch him for any other signs of illness. If your baby has a fever, or diarrhea along with vomiting, call your healthcare provider immediately.
Young babies can dehydrate quickly with vomiting and diarrhea.
Your baby may need treatment. All rights reserved. Information in this document is subject to change without notice.