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One of the main functions of the pancreas is the secretion of digestive enzymes such as proteases, trypsin, amylase and lipase. During a case of pancreatitis (the inflammation of the pancreas) swelling causes leakage of the digestive enzymes, whereby the pancreas literally starts to "digest itself".

The nausea can by brought on by one of two things;

  • Pain

Acute pancreatitis is characterized by severe pain. As you can imagine, organs trying to digest themselves aren't overly concerned with your comfort. Pain itself often times will produce nausea.

  • Improper food digestion
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Q: Why are nausea and vomiting symptoms of acute pancreatitis?
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