Question: where does the air come from when you burp

title: Burping
text: Burping is generally caused by swallowing air when eating or drinking and subsequently expelling it , so in this case the expelled gas is mainly a mixture of nitrogen and oxygen . Burps can also be caused by drinking carbonated beverages , such as beer and soft drinks in which case the expelled gas is primarily carbon dioxide from the drink itself . Common diabetes drugs metformin and Byetta can cause burping , especially at higher doses . This often resolves in a few weeks . Burping combined with other symptoms such as dyspepsia , nausea and heartburn may be a sign of an ulcer or hiatal hernia , and should be reviewed by a physician . Other causes of burping include : food allergy , gallbladder problems , acid reflux disease , H. pylori , and gastritis . 

Answer: answer: Burping is generally caused by swallowing air when eating or drinking and subsequently expelling it. Burps can also be caused by drinking carbonated beverages. Common diabetes drugs metformin and Byetta can cause burping. Other causes of burping include: food allergy, gallbladder problems, acid reflux disease, H. pylori, gastritis, or may be a sign of an ulcer or hiatal hernia.
answer: Burping is generally caused by swallowing air when eating or drinking and subsequently expelling it. Burps can also be caused by drinking carbonated beverages. Common diabetes drugs metformin and Byetta can cause burping.