The examination of the liver, gallbladder, pancreas, and spleen should refer to imaging tests such as color ultrasound or CT of the liver, gallbladder, pancreas, and spleen, which require fasting. Imaging examinations such as color ultrasound or CT of the liver, gallbladder, pancreas, spleen, and other organs are susceptible to abdominal gastrointestinal gas, and an increase in the production of gas in the gastrointestinal tract after eating may make the display of the liver, gallbladder, pancreas, and spleen unclear. Increased gastrointestinal tract contents after eating may also interfere with the visualization of the liver, gallbladder, pancreas and spleen. The human gallbladder is mainly used to store bile secreted by the liver, and after eating, the gallbladder will discharge bile for digesting food. The gallbladder deflates like a deflated balloon after eating, and lesions within the gallbladder and on the gallbladder wall can be easily missed. The gallbladder and the biliary system can be better visualized when the bile is full. A fasting period of about 8 hours is usually required before imaging tests such as liver, gallbladder, pancreas, and spleen ultrasound and CT, usually starting with fasting after dinner the day before and then going back for the test on an empty stomach on the morning of the 2nd day. Fasting is also required for liver function and other biochemical blood tests. If you have any liver, gallbladder, pancreas or spleen discomfort, please consult the hospital in time, choose the appropriate examination method under the doctor’s guidance, and actively diagnose and treat the disease to avoid adverse consequences.