Question: what does it mean when a baby spits up after eating?
Answer: For the babies that are not "happy spitters," spit-up may actually be caused by gastroesophageal reflux disease (GERD). If the lower esophageal sphincter doesn't tighten up immediately after it opens, the term "reflux" is used since the spit-up coming back up may be accompanied by stomach juices and acids.