It is not rare for neonates to vomit small amounts of mucus and blood that were swallowed during labour. This type of vomiting may be due to a mild gastritis and usually spontaneously resolves within 24 hours.
It is normal for many babies to regurgitate after feeds during the early weeks of life. As long as the baby continues to thrive then reassurance of the mother is all that is necessary. However, bile in the vomit is always pathological.
Last reviewed 01/2018