It is not necessarily necessary to fast when examining pancreatitis, but it is necessary to fast when examining the gallbladder, otherwise the gallbladder cannot be seen. However, for pancreatitis patients, once the onset of the disease, you need to immediately stop eating, and also need to abstain from drinking, then you need to go to the hospital to cooperate with the doctor to do the examination. If you are highly suspicious of pancreatitis, you need to check blood amylase, urine amylase, blood routine, blood biochemistry, blood biochemistry inside the main indicators are blood sugar, blood calcium, generally want to understand the fasting blood sugar situation. However, for patients with pancreatitis, if the acute onset of the disease are given the first time to do the examination, so this time you can check the random blood sugar, to the next day you can check the fasting blood sugar. Further imaging tests, such as pancreatic ultrasound and pancreatic thin layer CT, are also needed to improve the overall judgment of the presence of pancreatitis at this time.