The statement that pancreatic amylase is normal to exclude pancreatitis is wrong. In the early stage of pancreatitis, when the amylase index is not yet elevated, the measured amylase value can be within the normal range, and the time nodes of serum amylase and urinary amylase elevation, peak value, and decline to normal value are not the same. 1. Serum amylase: generally rises 2-12 hours after the onset of pancreatitis, reaches its peak value after 24 hours, and gradually declines to normal levels after 4-5 days. Therefore, when tested within two hours of the onset of pancreatitis, this indicator can be within the normal range. 2. Urinary amylase: it usually rises 24 hours after the onset of pancreatitis, reaches its peak in 48 hours, decreases slowly, and returns to normal after 1-2 weeks. If this indicator is detected within 24 hours after the onset of the disease, the results can be within the normal range. For patients suspected of having pancreatitis, they should immediately go to the relevant departments of regular hospitals and be treated under the guidance of specialized physicians to avoid delays. Patients should not make self-diagnosis against the checklist.