My three year old is constantly burping.

There are reasons for a toddler to burp constantly: - eat or drink too fast - consume too much gas-producing foods/drinks e.g. carbonated drink, beans or cabbage - improper breathing habits, e.g. tend to breath using mouth instead of nose - if heartburn coupled with constant burping, it indicates diseases or disorders known as Hiatal Hernia - Bacterial Infections - A particular strain of bacteria, called H. pylori can sometimes cause a stomach infection http://causessymptomsandtreatments.com/constant_burping/constant_burping.html You try to observe for 1-2 more days and if the condition is getting worse please bring him to PD for further check.